18269390449872 has 80 divisors (see below), whose sum is σ = 53857212134080. Its totient is φ = 5925207708288.

The previous prime is 18269390449823. The next prime is 18269390449889. The reversal of 18269390449872 is 27894409396281.

18269390449872 is a `hidden beast` number, since 1 + 8 + 2 + 6 + 93 + 90 + 449 + 8 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 18269390449872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571473958 + ... + 571505925.

It is an arithmetic number, because the mean of its divisors is an integer number (673215151676).

Almost surely, 2^{18269390449872} is an apocalyptic number.

18269390449872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18269390449872 is an abundant number, since it is smaller than the sum of its proper divisors (35587821684208).

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

18269390449872 is a wasteful number, since it uses less digits than its factorization.

18269390449872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142979937 (or 1142979925 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 72.

The spelling of 18269390449872 in words is "eighteen trillion, two hundred sixty-nine billion, three hundred ninety million, four hundred forty-nine thousand, eight hundred seventy-two".