18308254864 has 15 divisors (see below), whose sum is σ = 35473292467. Its totient is φ = 9153856816.

The previous prime is 18308254847. The next prime is 18308254931. The reversal of 18308254864 is 46845280381.

The square root of 18308254864 is 135308.

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

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, 524319 + ... + 558145.

Almost surely, 2^18308254864 is an apocalyptic number.

18308254864 is the 135308-th square number.

It is an amenable number.

18308254864 is a deficient number, since it is larger than the sum of its proper divisors (17165037603).

18308254864 is an frugal number, since it uses more digits than its factorization.

18308254864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67662 (or 33829 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 49.

Multiplying 18308254864 by its sum of digits (49), we get a square (897104488336 = 947156²).

The spelling of 18308254864 in words is "eighteen billion, three hundred eight million, two hundred fifty-four thousand, eight hundred sixty-four".