19697452512 has 48 divisors (see below), whose sum is σ = 51762799872. Its totient is φ = 6558581120.

The previous prime is 19697452469. The next prime is 19697452519. The reversal of 19697452512 is 21525479691.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×19697452512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19697452519) 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, 25158 + ... + 200069.

It is an arithmetic number, because the mean of its divisors is an integer number (1078391664).

Almost surely, 2^19697452512 is an apocalyptic number.

19697452512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19697452512 is an abundant number, since it is smaller than the sum of its proper divisors (32065347360).

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

19697452512 is a wasteful number, since it uses less digits than its factorization.

19697452512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226151 (or 226143 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

The spelling of 19697452512 in words is "nineteen billion, six hundred ninety-seven million, four hundred fifty-two thousand, five hundred twelve".