22431256650 has 144 divisors (see below), whose sum is σ = 66396384288. Its totient is φ = 5383920000.

The previous prime is 22431256643. The next prime is 22431256651. The reversal of 22431256650 is 5665213422.

22431256650 is a `hidden beast` number, since 2 + 2 + 43 + 1 + 2 + 566 + 50 = 666.

It is a super-2 number, since 2×22431256650² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22431256651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 477517 + ... + 522383.

It is an arithmetic number, because the mean of its divisors is an integer number (461086002).

Almost surely, 2^22431256650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22431256650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33198192144).

22431256650 is an abundant number, since it is smaller than the sum of its proper divisors (43965127638).

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

22431256650 is a wasteful number, since it uses less digits than its factorization.

22431256650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44997 (or 44989 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 22431256650 in words is "twenty-two billion, four hundred thirty-one million, two hundred fifty-six thousand, six hundred fifty".