202001020 has 96 divisors (see below), whose sum is σ = 473231808. Its totient is φ = 71964672.

The previous prime is 202001003. The next prime is 202001039. The reversal of 202001020 is 20100202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202000994 and 202001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1474392 + ... + 1474528.

It is an arithmetic number, because the mean of its divisors is an integer number (4929498).

Almost surely, 2^202001020 is an apocalyptic number.

202001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236615904).

202001020 is an abundant number, since it is smaller than the sum of its proper divisors (271230788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202001020 is a wasteful number, since it uses less digits than its factorization.

202001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 202001020 is about 14212.7062869814. The cubic root of 202001020 is about 586.7474184356.

Adding to 202001020 its reverse (20100202), we get a palindrome (222101222).

The spelling of 202001020 in words is "two hundred two million, one thousand, twenty".