19440100464 has 20 divisors (see below), whose sum is σ = 50220259656. Its totient is φ = 6480033472.

The previous prime is 19440100357. The next prime is 19440100489. The reversal of 19440100464 is 46400104491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202500999 + ... + 202501094.

Almost surely, 2^19440100464 is an apocalyptic number.

It is an amenable number.

19440100464 is an abundant number, since it is smaller than the sum of its proper divisors (30780159192).

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

19440100464 is a wasteful number, since it uses less digits than its factorization.

19440100464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405002104 (or 405002098 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 19440100464 in words is "nineteen billion, four hundred forty million, one hundred thousand, four hundred sixty-four".