19879700725 has 6 divisors (see below), whose sum is σ = 24650828930. Its totient is φ = 15903760560.

The previous prime is 19879700707. The next prime is 19879700747. The reversal of 19879700725 is 52700797891.

It can be written as a sum of positive squares in 3 ways, for example, as 5789535921 + 14090164804 = 76089^2 + 118702^2 .

It is not a de Polignac number, because 19879700725 - 2⁷ = 19879700597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 397593990 + ... + 397594039.

Almost surely, 2^19879700725 is an apocalyptic number.

It is an amenable number.

19879700725 is a deficient number, since it is larger than the sum of its proper divisors (4771128205).

19879700725 is an equidigital number, since it uses as much as digits as its factorization.

19879700725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795188039 (or 795188034 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 55.

The spelling of 19879700725 in words is "nineteen billion, eight hundred seventy-nine million, seven hundred thousand, seven hundred twenty-five".