20342900 has 18 divisors (see below), whose sum is σ = 44144310. Its totient is φ = 8137120.

The previous prime is 20342899. The next prime is 20342911. The reversal of 20342900 is 924302.

It can be written as a sum of positive squares in 3 ways, for example, as 164836 + 20178064 = 406^2 + 4492^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101615 + ... + 101814.

Almost surely, 2^20342900 is an apocalyptic number.

20342900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20342900 is an abundant number, since it is smaller than the sum of its proper divisors (23801410).

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

20342900 is a wasteful number, since it uses less digits than its factorization.

20342900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203443 (or 203436 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20342900 is about 4510.3104106037. The cubic root of 20342900 is about 272.9842691987.

The spelling of 20342900 in words is "twenty million, three hundred forty-two thousand, nine hundred".