19423712934 has 48 divisors (see below), whose sum is σ = 43986694752. Its totient is φ = 6182884224.

The previous prime is 19423712927. The next prime is 19423712941. The reversal of 19423712934 is 43921732491.

19423712934 is a `hidden beast` number, since 194 + 2 + 371 + 2 + 93 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (19423712927) and next prime (19423712941).

It is a self number, because there is not a number n which added to its sum of digits gives 19423712934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215514 + ... + 292050.

It is an arithmetic number, because the mean of its divisors is an integer number (916389474).

Almost surely, 2^19423712934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19423712934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21993347376).

19423712934 is an abundant number, since it is smaller than the sum of its proper divisors (24562981818).

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

19423712934 is a wasteful number, since it uses less digits than its factorization.

19423712934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77181 (or 77178 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 19423712934 in words is "nineteen billion, four hundred twenty-three million, seven hundred twelve thousand, nine hundred thirty-four".