18537421228274 has 32 divisors (see below), whose sum is σ = 30198599262720. Its totient is φ = 8483439284352.

The previous prime is 18537421228273. The next prime is 18537421228279. The reversal of 18537421228274 is 47282212473581.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18537421228273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58817 + ... + 6089195.

It is an arithmetic number, because the mean of its divisors is an integer number (943706226960).

Almost surely, 2^{18537421228274} is an apocalyptic number.

18537421228274 is a deficient number, since it is larger than the sum of its proper divisors (11661178034446).

18537421228274 is a wasteful number, since it uses less digits than its factorization.

18537421228274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6031394.

The product of its digits is 12042240, while the sum is 56.

The spelling of 18537421228274 in words is "eighteen trillion, five hundred thirty-seven billion, four hundred twenty-one million, two hundred twenty-eight thousand, two hundred seventy-four".