22135237856 has 24 divisors (see below), whose sum is σ = 45081466920. Its totient is φ = 10685976448.

The previous prime is 22135237843. The next prime is 22135237897. The reversal of 22135237856 is 65873253122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11925386 + ... + 11927241.

It is an arithmetic number, because the mean of its divisors is an integer number (1878394455).

Almost surely, 2^22135237856 is an apocalyptic number.

It is an amenable number.

22135237856 is an abundant number, since it is smaller than the sum of its proper divisors (22946229064).

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

22135237856 is a wasteful number, since it uses less digits than its factorization.

22135237856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23852666 (or 23852658 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The spelling of 22135237856 in words is "twenty-two billion, one hundred thirty-five million, two hundred thirty-seven thousand, eight hundred fifty-six".