19234742556 has 12 divisors (see below), whose sum is σ = 44881065992. Its totient is φ = 6411580848.

The previous prime is 19234742491. The next prime is 19234742591. The reversal of 19234742556 is 65524743291.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801447595 + ... + 801447618.

Almost surely, 2^19234742556 is an apocalyptic number.

It is an amenable number.

19234742556 is an abundant number, since it is smaller than the sum of its proper divisors (25646323436).

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

19234742556 is a wasteful number, since it uses less digits than its factorization.

19234742556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602895220 (or 1602895218 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 48.

The spelling of 19234742556 in words is "nineteen billion, two hundred thirty-four million, seven hundred forty-two thousand, five hundred fifty-six".