22325397840 has 60 divisors (see below), whose sum is σ = 74976130164. Its totient is φ = 5953439232.

The previous prime is 22325397827. The next prime is 22325397881. The reversal of 22325397840 is 4879352322.

22325397840 is a `hidden beast` number, since 2 + 2 + 3 + 2 + 539 + 78 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14800182336 + 7525215504 = 121656^2 + 86748^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-3 number, since 3×22325397840³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15503029 + ... + 15504468.

Almost surely, 2^22325397840 is an apocalyptic number.

22325397840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22325397840 is an abundant number, since it is smaller than the sum of its proper divisors (52650732324).

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

22325397840 is a wasteful number, since it uses less digits than its factorization.

22325397840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31007516 (or 31007507 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 22325397840 in words is "twenty-two billion, three hundred twenty-five million, three hundred ninety-seven thousand, eight hundred forty".