20942020 has 24 divisors (see below), whose sum is σ = 47976768. Its totient is φ = 7615200.

The previous prime is 20941993. The next prime is 20942023. The reversal of 20942020 is 2024902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20942023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47376 + ... + 47815.

It is an arithmetic number, because the mean of its divisors is an integer number (1999032).

Almost surely, 2^20942020 is an apocalyptic number.

20942020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20942020 is an abundant number, since it is smaller than the sum of its proper divisors (27034748).

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

20942020 is a wasteful number, since it uses less digits than its factorization.

20942020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95211 (or 95209 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20942020 is about 4576.2451857391. The cubic root of 20942020 is about 275.6382749934.

Adding to 20942020 its reverse (2024902), we get a palindrome (22966922).

It can be divided in two parts, 2094 and 2020, that added together give a palindrome (4114).

The spelling of 20942020 in words is "twenty million, nine hundred forty-two thousand, twenty".