19631430725 has 12 divisors (see below), whose sum is σ = 24504190560. Its totient is φ = 15601134000.

The previous prime is 19631430673. The next prime is 19631430739. The reversal of 19631430725 is 52703413691.

It is not a de Polignac number, because 19631430725 - 2⁶ = 19631430661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2596415 + ... + 2603964.

It is an arithmetic number, because the mean of its divisors is an integer number (2042015880).

Almost surely, 2^19631430725 is an apocalyptic number.

It is an amenable number.

19631430725 is a deficient number, since it is larger than the sum of its proper divisors (4872759835).

19631430725 is a wasteful number, since it uses less digits than its factorization.

19631430725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200540 (or 5200535 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 19631430725 in words is "nineteen billion, six hundred thirty-one million, four hundred thirty thousand, seven hundred twenty-five".