18138702216435 has 32 divisors (see below), whose sum is σ = 29065266367488. Its totient is φ = 9659537544960.

The previous prime is 18138702216421. The next prime is 18138702216493. The reversal of 18138702216435 is 53461220783181.

It is not a de Polignac number, because 18138702216435 - 2⁵ = 18138702216403 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27066214 + ... + 27728276.

It is an arithmetic number, because the mean of its divisors is an integer number (908289573984).

Almost surely, 2^{18138702216435} is an apocalyptic number.

18138702216435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18138702216435 is a deficient number, since it is larger than the sum of its proper divisors (10926564151053).

18138702216435 is a wasteful number, since it uses less digits than its factorization.

18138702216435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664795.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 18138702216435 in words is "eighteen trillion, one hundred thirty-eight billion, seven hundred two million, two hundred sixteen thousand, four hundred thirty-five".