18211361662 has 32 divisors (see below), whose sum is σ = 29519723520. Its totient is φ = 8376346080.

The previous prime is 18211361627. The next prime is 18211361669. The reversal of 18211361662 is 26616311281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18211361669) 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, 16510203 + ... + 16511305.

It is an arithmetic number, because the mean of its divisors is an integer number (922491360).

Almost surely, 2^18211361662 is an apocalyptic number.

18211361662 is a deficient number, since it is larger than the sum of its proper divisors (11308361858).

18211361662 is a wasteful number, since it uses less digits than its factorization.

18211361662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728.

The product of its digits is 20736, while the sum is 37.

The spelling of 18211361662 in words is "eighteen billion, two hundred eleven million, three hundred sixty-one thousand, six hundred sixty-two".