18937062544 has 15 divisors (see below), whose sum is σ = 36691625203. Its totient is φ = 9468256048.

The previous prime is 18937062533. The next prime is 18937062559. The reversal of 18937062544 is 44526073981.

It is a happy number.

The square root of 18937062544 is 137612.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×18937062544² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 533247 + ... + 567649.

It is a 1-persistent number, because it is pandigital, but 2⋅18937062544 = 37874125088 is not.

Almost surely, 2^18937062544 is an apocalyptic number.

18937062544 is the 137612-nd square number.

It is an amenable number.

18937062544 is a deficient number, since it is larger than the sum of its proper divisors (17754562659).

18937062544 is an frugal number, since it uses more digits than its factorization.

18937062544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68814 (or 34405 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

Multiplying 18937062544 by its sum of digits (49), we get a square (927916064656 = 963284²).

The spelling of 18937062544 in words is "eighteen billion, nine hundred thirty-seven million, sixty-two thousand, five hundred forty-four".