19868725425 has 24 divisors (see below), whose sum is σ = 32910413440. Its totient is φ = 10577044800.

The previous prime is 19868725399. The next prime is 19868725451. The reversal of 19868725425 is 52452786891.

It is an interprime number because it is at equal distance from previous prime (19868725399) and next prime (19868725451).

It is not a de Polignac number, because 19868725425 - 2⁸ = 19868725169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204265 + ... + 285414.

Almost surely, 2^19868725425 is an apocalyptic number.

19868725425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19868725425 is a deficient number, since it is larger than the sum of its proper divisors (13041688015).

19868725425 is a wasteful number, since it uses less digits than its factorization.

19868725425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490233 (or 490228 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 57.

The spelling of 19868725425 in words is "nineteen billion, eight hundred sixty-eight million, seven hundred twenty-five thousand, four hundred twenty-five".