22721418500 has 96 divisors (see below), whose sum is σ = 54615375360. Its totient is φ = 8188992000.

The previous prime is 22721418491. The next prime is 22721418523. The reversal of 22721418500 is 581412722.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 603221 + ... + 639779.

It is an arithmetic number, because the mean of its divisors is an integer number (568910160).

Almost surely, 2^22721418500 is an apocalyptic number.

22721418500 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 22721418500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27307687680).

22721418500 is an abundant number, since it is smaller than the sum of its proper divisors (31893956860).

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

22721418500 is a wasteful number, since it uses less digits than its factorization.

22721418500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36702 (or 36690 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 22721418500 in words is "twenty-two billion, seven hundred twenty-one million, four hundred eighteen thousand, five hundred".