19294171440 has 80 divisors (see below), whose sum is σ = 60341325408. Its totient is φ = 5099573248.

The previous prime is 19294171439. The next prime is 19294171513. The reversal of 19294171440 is 4417149291.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×19294171440² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19294171392 and 19294171401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328599 + ... + 382838.

Almost surely, 2^19294171440 is an apocalyptic number.

19294171440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19294171440 is an abundant number, since it is smaller than the sum of its proper divisors (41047153968).

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

19294171440 is a wasteful number, since it uses less digits than its factorization.

19294171440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711566 (or 711560 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 19294171440 in words is "nineteen billion, two hundred ninety-four million, one hundred seventy-one thousand, four hundred forty".