20013232220 has 24 divisors (see below), whose sum is σ = 42187600224. Its totient is φ = 7974852416.

The previous prime is 20013232193. The next prime is 20013232231. The reversal of 20013232220 is 2223231002.

It is a super-2 number, since 2×20013232220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897139 + ... + 1907658.

It is an arithmetic number, because the mean of its divisors is an integer number (1757816676).

Almost surely, 2^20013232220 is an apocalyptic number.

20013232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013232220 is an abundant number, since it is smaller than the sum of its proper divisors (22174368004).

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

20013232220 is a wasteful number, since it uses less digits than its factorization.

20013232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805069 (or 3805067 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20013232220 its reverse (2223231002), we get a palindrome (22236463222).

The spelling of 20013232220 in words is "twenty billion, thirteen million, two hundred thirty-two thousand, two hundred twenty".