20202900 has 36 divisors (see below), whose sum is σ = 58454592. Its totient is φ = 5387360.

The previous prime is 20202883. The next prime is 20202943. The reversal of 20202900 is 920202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20202900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33372 + ... + 33971.

Almost surely, 2^20202900 is an apocalyptic number.

20202900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202900 is an abundant number, since it is smaller than the sum of its proper divisors (38251692).

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

20202900 is a wasteful number, since it uses less digits than its factorization.

20202900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67360 (or 67353 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20202900 is about 4494.7636200361. The cubic root of 20202900 is about 272.3566004763.

The spelling of 20202900 in words is "twenty million, two hundred two thousand, nine hundred".