18406804197374 has 16 divisors (see below), whose sum is σ = 27653034728880. Its totient is φ = 9189126512640.

The previous prime is 18406804197361. The next prime is 18406804197389. The reversal of 18406804197374 is 47379140860481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86731262 + ... + 86943230.

It is an arithmetic number, because the mean of its divisors is an integer number (1728314670555).

Almost surely, 2^{18406804197374} is an apocalyptic number.

18406804197374 is a deficient number, since it is larger than the sum of its proper divisors (9246230531506).

18406804197374 is a wasteful number, since it uses less digits than its factorization.

18406804197374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279115.

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 18406804197374 in words is "eighteen trillion, four hundred six billion, eight hundred four million, one hundred ninety-seven thousand, three hundred seventy-four".