19971495024 has 40 divisors (see below), whose sum is σ = 55561725072. Its totient is φ = 6145075200.

The previous prime is 19971495001. The next prime is 19971495053. The reversal of 19971495024 is 42059417991.

It is a super-2 number, since 2×19971495024² (a number of 21 digits) contains 22 as substring.

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, 16002177 + ... + 16003424.

Almost surely, 2^19971495024 is an apocalyptic number.

It is an amenable number.

19971495024 is an abundant number, since it is smaller than the sum of its proper divisors (35590230048).

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

19971495024 is a wasteful number, since it uses less digits than its factorization.

19971495024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32005625 (or 32005619 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 19971495024 in words is "nineteen billion, nine hundred seventy-one million, four hundred ninety-five thousand, twenty-four".