19631977004 has 12 divisors (see below), whose sum is σ = 34361606328. Its totient is φ = 9814375200.

The previous prime is 19631977003. The next prime is 19631977021. The reversal of 19631977004 is 40077913691.

It is a self number, because there is not a number n which added to its sum of digits gives 19631977004.

It is not an unprimeable number, because it can be changed into a prime (19631977003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375737 + ... + 424784.

It is an arithmetic number, because the mean of its divisors is an integer number (2863467194).

Almost surely, 2^19631977004 is an apocalyptic number.

It is an amenable number.

19631977004 is a deficient number, since it is larger than the sum of its proper divisors (14729629324).

19631977004 is a wasteful number, since it uses less digits than its factorization.

19631977004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806656 (or 806654 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 19631977004 in words is "nineteen billion, six hundred thirty-one million, nine hundred seventy-seven thousand, four".