19734942544 has 10 divisors (see below), whose sum is σ = 38236451210. Its totient is φ = 9867471264.

The previous prime is 19734942533. The next prime is 19734942551. The reversal of 19734942544 is 44524943791.

It can be written as a sum of positive squares in only one way, i.e., 19178926144 + 556016400 = 138488^2 + 23580^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19734942491 and 19734942500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616716939 + ... + 616716970.

It is an arithmetic number, because the mean of its divisors is an integer number (3823645121).

Almost surely, 2^19734942544 is an apocalyptic number.

It is an amenable number.

19734942544 is a deficient number, since it is larger than the sum of its proper divisors (18501508666).

19734942544 is a wasteful number, since it uses less digits than its factorization.

19734942544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233433917 (or 1233433911 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The spelling of 19734942544 in words is "nineteen billion, seven hundred thirty-four million, nine hundred forty-two thousand, five hundred forty-four".