20022120 has 64 divisors (see below), whose sum is σ = 66744000. Its totient is φ = 5338944.

The previous prime is 20022113. The next prime is 20022127. The reversal of 20022120 is 2122002.

It is an interprime number because it is at equal distance from previous prime (20022113) and next prime (20022127).

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

It is not an unprimeable number, because it can be changed into a prime (20022127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8190 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (1042875).

Almost surely, 2^20022120 is an apocalyptic number.

20022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022120 is an abundant number, since it is smaller than the sum of its proper divisors (46721880).

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

20022120 is a wasteful number, since it uses less digits than its factorization.

20022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18559 (or 18549 counting only the distinct ones).

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

The square root of 20022120 is about 4474.6083627509. The cubic root of 20022120 is about 271.5417963186.

Adding to 20022120 its reverse (2122002), we get a palindrome (22144122).

The spelling of 20022120 in words is "twenty million, twenty-two thousand, one hundred twenty".