18164603562 has 64 divisors (see below), whose sum is σ = 42284519424. Its totient is φ = 5094745920.

The previous prime is 18164603549. The next prime is 18164603591. The reversal of 18164603562 is 26530646181.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 813487 + ... + 835517.

It is an arithmetic number, because the mean of its divisors is an integer number (660695616).

Almost surely, 2^18164603562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18164603562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21142259712).

18164603562 is an abundant number, since it is smaller than the sum of its proper divisors (24119915862).

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

18164603562 is a wasteful number, since it uses less digits than its factorization.

18164603562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22403.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 18164603562 in words is "eighteen billion, one hundred sixty-four million, six hundred three thousand, five hundred sixty-two".