19697533632 has 84 divisors (see below), whose sum is σ = 64525068816. Its totient is φ = 5627865600.

The previous prime is 19697533627. The next prime is 19697533649. The reversal of 19697533632 is 23633579691.

19697533632 is a `hidden beast` number, since 19 + 6 + 97 + 533 + 6 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×19697533632² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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, 2438619 + ... + 2446682.

Almost surely, 2^19697533632 is an apocalyptic number.

19697533632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19697533632 is an abundant number, since it is smaller than the sum of its proper divisors (44827535184).

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

19697533632 is a wasteful number, since it uses less digits than its factorization.

19697533632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885326 (or 4885313 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 54.

The spelling of 19697533632 in words is "nineteen billion, six hundred ninety-seven million, five hundred thirty-three thousand, six hundred thirty-two".