20125717400 has 48 divisors (see below), whose sum is σ = 46901060640. Its totient is φ = 8031574400.

The previous prime is 20125717399. The next prime is 20125717411. The reversal of 20125717400 is 471752102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30539 + ... + 202938.

It is an arithmetic number, because the mean of its divisors is an integer number (977105430).

Almost surely, 2^20125717400 is an apocalyptic number.

20125717400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20125717400 is an abundant number, since it is smaller than the sum of its proper divisors (26775343240).

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

20125717400 is a wasteful number, since it uses less digits than its factorization.

20125717400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233924 (or 233915 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The spelling of 20125717400 in words is "twenty billion, one hundred twenty-five million, seven hundred seventeen thousand, four hundred".