20742900 has 36 divisors (see below), whose sum is σ = 60016992. Its totient is φ = 5531360.

The previous prime is 20742893. The next prime is 20742901. The reversal of 20742900 is 924702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34272 + ... + 34871.

Almost surely, 2^20742900 is an apocalyptic number.

20742900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20742900 is an abundant number, since it is smaller than the sum of its proper divisors (39274092).

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

20742900 is a wasteful number, since it uses less digits than its factorization.

20742900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69160 (or 69153 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20742900 is about 4554.4373966496. The cubic root of 20742900 is about 274.7618875506.

The spelling of 20742900 in words is "twenty million, seven hundred forty-two thousand, nine hundred".