19678504025 has 12 divisors (see below), whose sum is σ = 24920524032. Its totient is φ = 15407849040.

The previous prime is 19678504009. The next prime is 19678504031. The reversal of 19678504025 is 52040587691.

It is a happy number.

It is not a de Polignac number, because 19678504025 - 2⁴ = 19678504009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8372657 + ... + 8375006.

It is an arithmetic number, because the mean of its divisors is an integer number (2076710336).

Almost surely, 2^19678504025 is an apocalyptic number.

It is an amenable number.

19678504025 is a deficient number, since it is larger than the sum of its proper divisors (5242020007).

19678504025 is a wasteful number, since it uses less digits than its factorization.

19678504025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16747720 (or 16747715 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 19678504025 in words is "nineteen billion, six hundred seventy-eight million, five hundred four thousand, twenty-five".