19967043408 has 40 divisors (see below), whose sum is σ = 55549340448. Its totient is φ = 6143705472.

The previous prime is 19967043407. The next prime is 19967043413. The reversal of 19967043408 is 80434076991.

It is a super-3 number, since 3×19967043408³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19967043401) 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, 15998610 + ... + 15999857.

Almost surely, 2^19967043408 is an apocalyptic number.

It is an amenable number.

19967043408 is an abundant number, since it is smaller than the sum of its proper divisors (35582297040).

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

19967043408 is a wasteful number, since it uses less digits than its factorization.

19967043408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31998491 (or 31998485 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 19967043408 in words is "nineteen billion, nine hundred sixty-seven million, forty-three thousand, four hundred eight".