19426638432 has 24 divisors (see below), whose sum is σ = 50994926136. Its totient is φ = 6475546112.

The previous prime is 19426638401. The next prime is 19426638449. The reversal of 19426638432 is 23483662491.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101180313 + ... + 101180504.

It is an arithmetic number, because the mean of its divisors is an integer number (2124788589).

Almost surely, 2^19426638432 is an apocalyptic number.

19426638432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19426638432 is an abundant number, since it is smaller than the sum of its proper divisors (31568287704).

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

19426638432 is a wasteful number, since it uses less digits than its factorization.

19426638432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202360830 (or 202360822 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The spelling of 19426638432 in words is "nineteen billion, four hundred twenty-six million, six hundred thirty-eight thousand, four hundred thirty-two".