19959129456 has 40 divisors (see below), whose sum is σ = 58926954624. Its totient is φ = 5702608320.

The previous prime is 19959129427. The next prime is 19959129493. The reversal of 19959129456 is 65492195991.

It is a self number, because there is not a number n which added to its sum of digits gives 19959129456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29700750 + ... + 29701421.

Almost surely, 2^19959129456 is an apocalyptic number.

19959129456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19959129456 is an abundant number, since it is smaller than the sum of its proper divisors (38967825168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19959129456 is a wasteful number, since it uses less digits than its factorization.

19959129456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59402189 (or 59402183 counting only the distinct ones).

The product of its digits is 7873200, while the sum is 60.

The spelling of 19959129456 in words is "nineteen billion, nine hundred fifty-nine million, one hundred twenty-nine thousand, four hundred fifty-six".