22539493860 has 384 divisors, whose sum is σ = 74071065600. Its totient is φ = 5071503360.

The previous prime is 22539493817. The next prime is 22539493901. The reversal of 22539493860 is 6839493522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 83789806 + ... + 83790074.

It is an arithmetic number, because the mean of its divisors is an integer number (192893400).

Almost surely, 2^22539493860 is an apocalyptic number.

22539493860 is a gapful number since it is divisible by the number (20) 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 22539493860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37035532800).

22539493860 is an abundant number, since it is smaller than the sum of its proper divisors (51531571740).

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

22539493860 is a wasteful number, since it uses less digits than its factorization.

22539493860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 22539493860 in words is "twenty-two billion, five hundred thirty-nine million, four hundred ninety-three thousand, eight hundred sixty".