19971415632 has 40 divisors (see below), whose sum is σ = 58963228096. Its totient is φ = 5706118656.

The previous prime is 19971415631. The next prime is 19971415693. The reversal of 19971415632 is 23651417991.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19971415631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29719033 + ... + 29719704.

Almost surely, 2^19971415632 is an apocalyptic number.

19971415632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19971415632 is an abundant number, since it is smaller than the sum of its proper divisors (38991812464).

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

19971415632 is a wasteful number, since it uses less digits than its factorization.

19971415632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59438755 (or 59438749 counting only the distinct ones).

The product of its digits is 408240, while the sum is 48.

The spelling of 19971415632 in words is "nineteen billion, nine hundred seventy-one million, four hundred fifteen thousand, six hundred thirty-two".