18912722463376 has 45 divisors (see below), whose sum is σ = 42626270100969. Its totient is φ = 8105400297792.

The previous prime is 18912722463359. The next prime is 18912722463499. The reversal of 18912722463376 is 67336422721981.

The square root of 18912722463376 is 4348876.

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

It can be written as a sum of positive squares in only one way, i.e., 18873290035600 + 39432427776 = 4344340^2 + 198576^2 .

It is a super-2 number, since 2×18912722463376² (a number of 27 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 8 ways as a sum of consecutive naturals, for example, 121690870 + ... + 121846186.

Almost surely, 2^{18912722463376} is an apocalyptic number.

18912722463376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18912722463376 is the 4348876-th square number.

It is an amenable number.

18912722463376 is an abundant number, since it is smaller than the sum of its proper divisors (23713547637593).

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

18912722463376 is an frugal number, since it uses more digits than its factorization.

18912722463376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310656 (or 155326 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 61.

The spelling of 18912722463376 in words is "eighteen trillion, nine hundred twelve billion, seven hundred twenty-two million, four hundred sixty-three thousand, three hundred seventy-six".