20815096402218 has 64 divisors (see below), whose sum is σ = 41931465892992. Its totient is φ = 6888310087680.

The previous prime is 20815096402211. The next prime is 20815096402231. The reversal of 20815096402218 is 81220469051802.

It is not an unprimeable number, because it can be changed into a prime (20815096402211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2375876958 + ... + 2375885718.

It is an arithmetic number, because the mean of its divisors is an integer number (655179154578).

Almost surely, 2^{20815096402218} is an apocalyptic number.

20815096402218 is an abundant number, since it is smaller than the sum of its proper divisors (21116369490774).

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

20815096402218 is a wasteful number, since it uses less digits than its factorization.

20815096402218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12919.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 20815096402218 in words is "twenty trillion, eight hundred fifteen billion, ninety-six million, four hundred two thousand, two hundred eighteen".