20160218178564 has 24 divisors (see below), whose sum is σ = 47837805849120. Its totient is φ = 6606173188224.

The previous prime is 20160218178563. The next prime is 20160218178577. The reversal of 20160218178564 is 46587181206102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20160218178563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14237441509 + ... + 14237442924.

It is an arithmetic number, because the mean of its divisors is an integer number (1993241910380).

Almost surely, 2^{20160218178564} is an apocalyptic number.

It is an amenable number.

20160218178564 is an abundant number, since it is smaller than the sum of its proper divisors (27677587670556).

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

20160218178564 is a wasteful number, since it uses less digits than its factorization.

20160218178564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28474884499 (or 28474884497 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 20160218178564 in words is "twenty trillion, one hundred sixty billion, two hundred eighteen million, one hundred seventy-eight thousand, five hundred sixty-four".