20212902 has 20 divisors (see below), whose sum is σ = 45292236. Its totient is φ = 6737580.

The previous prime is 20212891. The next prime is 20212909. The reversal of 20212902 is 20921202.

It is a super-2 number, since 2×20212902² = 817122814523208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212909) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62224 + ... + 62547.

Almost surely, 2^20212902 is an apocalyptic number.

20212902 is an abundant number, since it is smaller than the sum of its proper divisors (25079334).

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

20212902 is a wasteful number, since it uses less digits than its factorization.

20212902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124785 (or 124776 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20212902 is about 4495.8761103927. The cubic root of 20212902 is about 272.4015389305.

The spelling of 20212902 in words is "twenty million, two hundred twelve thousand, nine hundred two".