19864634496 has 96 divisors (see below), whose sum is σ = 61380258480. Its totient is φ = 5675604480.

The previous prime is 19864634479. The next prime is 19864634509. The reversal of 19864634496 is 69443646891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×19864634496³ (a number of 32 digits) contains 333 as substring.

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, 509050 + ... + 546681.

Almost surely, 2^19864634496 is an apocalyptic number.

19864634496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19864634496 is an abundant number, since it is smaller than the sum of its proper divisors (41515623984).

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

19864634496 is a wasteful number, since it uses less digits than its factorization.

19864634496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055762 (or 1055743 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 60.

The spelling of 19864634496 in words is "nineteen billion, eight hundred sixty-four million, six hundred thirty-four thousand, four hundred ninety-six".