18211462056 has 24 divisors (see below), whose sum is σ = 49322709930. Its totient is φ = 6070487328.

The previous prime is 18211461967. The next prime is 18211462067. The reversal of 18211462056 is 65026411281.

It is a happy number.

18211462056 is a `hidden beast` number, since 1 + 8 + 21 + 1 + 4 + 620 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12023122500 + 6188339556 = 109650^2 + 78666^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18211462056.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126468415 + ... + 126468558.

Almost surely, 2^18211462056 is an apocalyptic number.

It is an amenable number.

18211462056 is an abundant number, since it is smaller than the sum of its proper divisors (31111247874).

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

18211462056 is a wasteful number, since it uses less digits than its factorization.

18211462056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252936985 (or 252936978 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 18211462056 in words is "eighteen billion, two hundred eleven million, four hundred sixty-two thousand, fifty-six".