22431220308 has 144 divisors (see below), whose sum is σ = 65585520000. Its totient is φ = 6331716864.

The previous prime is 22431220307. The next prime is 22431220313. The reversal of 22431220308 is 80302213422.

22431220308 is a `hidden beast` number, since 2 + 2 + 431 + 220 + 3 + 0 + 8 = 666.

It is a super-4 number, since 4×22431220308⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431220307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11508118 + ... + 11510066.

It is an arithmetic number, because the mean of its divisors is an integer number (455455000).

Almost surely, 2^22431220308 is an apocalyptic number.

22431220308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22431220308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32792760000).

22431220308 is an abundant number, since it is smaller than the sum of its proper divisors (43154299692).

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

22431220308 is a wasteful number, since it uses less digits than its factorization.

22431220308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2489 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 22431220308 in words is "twenty-two billion, four hundred thirty-one million, two hundred twenty thousand, three hundred eight".