20651143725 has 48 divisors (see below), whose sum is σ = 37960665600. Its totient is φ = 11007048960.

The previous prime is 20651143663. The next prime is 20651143727. The reversal of 20651143725 is 52734115602.

20651143725 is a `hidden beast` number, since 206 + 5 + 11 + 437 + 2 + 5 = 666.

It is not a de Polignac number, because 20651143725 - 2²³ = 20642755117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20651143725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20651143727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1178629 + ... + 1196021.

It is an arithmetic number, because the mean of its divisors is an integer number (790847200).

Almost surely, 2^20651143725 is an apocalyptic number.

20651143725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20651143725 is a deficient number, since it is larger than the sum of its proper divisors (17309521875).

20651143725 is a wasteful number, since it uses less digits than its factorization.

20651143725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19171 (or 19160 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20651143725 in words is "twenty billion, six hundred fifty-one million, one hundred forty-three thousand, seven hundred twenty-five".