19734900432 has 160 divisors (see below), whose sum is σ = 60138650880. Its totient is φ = 5517926400.

The previous prime is 19734900401. The next prime is 19734900509. The reversal of 19734900432 is 23400943791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275557 + ... + 339707.

It is an arithmetic number, because the mean of its divisors is an integer number (375866568).

Almost surely, 2^19734900432 is an apocalyptic number.

19734900432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19734900432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30069325440).

19734900432 is an abundant number, since it is smaller than the sum of its proper divisors (40403750448).

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

19734900432 is a wasteful number, since it uses less digits than its factorization.

19734900432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64221 (or 64215 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 19734900432 in words is "nineteen billion, seven hundred thirty-four million, nine hundred thousand, four hundred thirty-two".