20691725900 has 36 divisors (see below), whose sum is σ = 45516144072. Its totient is φ = 8163308160.

The previous prime is 20691725893. The next prime is 20691725909. The reversal of 20691725900 is 952719602.

It is a super-3 number, since 3×20691725900³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20691725909) 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, 1409942 + ... + 1424541.

Almost surely, 2^20691725900 is an apocalyptic number.

20691725900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20691725900 is an abundant number, since it is smaller than the sum of its proper divisors (24824418172).

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

20691725900 is a wasteful number, since it uses less digits than its factorization.

20691725900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834570 (or 2834563 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 20691725900 in words is "twenty billion, six hundred ninety-one million, seven hundred twenty-five thousand, nine hundred".