18405022272 has 112 divisors (see below), whose sum is σ = 59934360192. Its totient is φ = 4854067200.

The previous prime is 18405022247. The next prime is 18405022301. The reversal of 18405022272 is 27222050481.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509229 + ... + 544172.

It is an arithmetic number, because the mean of its divisors is an integer number (535128216).

Almost surely, 2^18405022272 is an apocalyptic number.

18405022272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18405022272 is an abundant number, since it is smaller than the sum of its proper divisors (41529337920).

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

18405022272 is a wasteful number, since it uses less digits than its factorization.

18405022272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053436 (or 1053426 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The spelling of 18405022272 in words is "eighteen billion, four hundred five million, twenty-two thousand, two hundred seventy-two".