20872888218 has 320 divisors, whose sum is σ = 62625201408. Its totient is φ = 5038848000.

The previous prime is 20872888213. The next prime is 20872888229. The reversal of 20872888218 is 81288827802.

It is a super-2 number, since 2×20872888218² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (20872888213) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9271593 + ... + 9273843.

Almost surely, 2^20872888218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20872888218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31312600704).

20872888218 is an abundant number, since it is smaller than the sum of its proper divisors (41752313190).

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

20872888218 is a wasteful number, since it uses less digits than its factorization.

20872888218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339 (or 2330 counting only the distinct ones).

The product of its (nonzero) digits is 1835008, while the sum is 54.

The spelling of 20872888218 in words is "twenty billion, eight hundred seventy-two million, eight hundred eighty-eight thousand, two hundred eighteen".