20719158725 has 48 divisors (see below), whose sum is σ = 26473275840. Its totient is φ = 16080768000.

The previous prime is 20719158709. The next prime is 20719158737. The reversal of 20719158725 is 52785191702.

It is not a de Polignac number, because 20719158725 - 2⁴ = 20719158709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20719158725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51668525 + ... + 51668925.

It is an arithmetic number, because the mean of its divisors is an integer number (551526580).

Almost surely, 2^20719158725 is an apocalyptic number.

20719158725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20719158725 is a deficient number, since it is larger than the sum of its proper divisors (5754117115).

20719158725 is a wasteful number, since it uses less digits than its factorization.

20719158725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 20719158725 in words is "twenty billion, seven hundred nineteen million, one hundred fifty-eight thousand, seven hundred twenty-five".