20220120 has 48 divisors (see below), whose sum is σ = 65716560. Its totient is φ = 5391936.

The previous prime is 20220119. The next prime is 20220121. The reversal of 20220120 is 2102202.

It is an interprime number because it is at equal distance from previous prime (20220119) and next prime (20220121).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27724 + ... + 28443.

It is an arithmetic number, because the mean of its divisors is an integer number (1369095).

Almost surely, 2^20220120 is an apocalyptic number.

20220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220120 is an abundant number, since it is smaller than the sum of its proper divisors (45496440).

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

20220120 is a wasteful number, since it uses less digits than its factorization.

20220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56184 (or 56177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20220120 is about 4496.6787743845. The cubic root of 20220120 is about 272.4339598122.

Adding to 20220120 its reverse (2102202), we get a palindrome (22322322).

The spelling of 20220120 in words is "twenty million, two hundred twenty thousand, one hundred twenty".