22504304640 has 208 divisors, whose sum is σ = 72494674848. Its totient is φ = 5960368128.

The previous prime is 22504304633. The next prime is 22504304651. The reversal of 22504304640 is 4640340522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22504304598 and 22504304607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9644914 + ... + 9647246.

Almost surely, 2^22504304640 is an apocalyptic number.

22504304640 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 22504304640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36247337424).

22504304640 is an abundant number, since it is smaller than the sum of its proper divisors (49990370208).

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

22504304640 is a wasteful number, since it uses less digits than its factorization.

22504304640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522 (or 2500 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The spelling of 22504304640 in words is "twenty-two billion, five hundred four million, three hundred four thousand, six hundred forty".