20533409700 has 72 divisors (see below), whose sum is σ = 59424613248. Its totient is φ = 5474229120.

The previous prime is 20533409647. The next prime is 20533409723. The reversal of 20533409700 is 790433502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2053914 + ... + 2063886.

Almost surely, 2^20533409700 is an apocalyptic number.

20533409700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533409700 is an abundant number, since it is smaller than the sum of its proper divisors (38891203548).

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

20533409700 is a wasteful number, since it uses less digits than its factorization.

20533409700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16853 (or 16846 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 33.

The spelling of 20533409700 in words is "twenty billion, five hundred thirty-three million, four hundred nine thousand, seven hundred".