19440509924 has 24 divisors (see below), whose sum is σ = 37722127296. Its totient is φ = 8691732000.

The previous prime is 19440509917. The next prime is 19440509941. The reversal of 19440509924 is 42990504491.

It is a super-2 number, since 2×19440509924² (a number of 21 digits) contains 22 as substring.

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, 3618872 + ... + 3624239.

It is an arithmetic number, because the mean of its divisors is an integer number (1571755304).

Almost surely, 2^19440509924 is an apocalyptic number.

It is an amenable number.

19440509924 is a deficient number, since it is larger than the sum of its proper divisors (18281617372).

19440509924 is a wasteful number, since it uses less digits than its factorization.

19440509924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243187 (or 7243185 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 19440509924 in words is "nineteen billion, four hundred forty million, five hundred nine thousand, nine hundred twenty-four".