22101666520 has 16 divisors (see below), whose sum is σ = 49728749760. Its totient is φ = 8840666592.

The previous prime is 22101666491. The next prime is 22101666553. The reversal of 22101666520 is 2566610122.

It is a super-2 number, since 2×22101666520² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276270792 + ... + 276270871.

It is an arithmetic number, because the mean of its divisors is an integer number (3108046860).

Almost surely, 2^22101666520 is an apocalyptic number.

22101666520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101666520 is an abundant number, since it is smaller than the sum of its proper divisors (27627083240).

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

22101666520 is a wasteful number, since it uses less digits than its factorization.

22101666520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552541674 (or 552541670 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 22101666520 in words is "twenty-two billion, one hundred one million, six hundred sixty-six thousand, five hundred twenty".