22100542440 has 64 divisors (see below), whose sum is σ = 66324389760. Its totient is φ = 5891454720.

The previous prime is 22100542423. The next prime is 22100542441. The reversal of 22100542440 is 4424500122.

It is a happy number.

It is a super-2 number, since 2×22100542440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22100542440.

It is not an unprimeable number, because it can be changed into a prime (22100542441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337237 + ... + 397403.

It is an arithmetic number, because the mean of its divisors is an integer number (1036318590).

Almost surely, 2^22100542440 is an apocalyptic number.

22100542440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22100542440 is an abundant number, since it is smaller than the sum of its proper divisors (44223847320).

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

22100542440 is a wasteful number, since it uses less digits than its factorization.

22100542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63242 (or 63238 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The spelling of 22100542440 in words is "twenty-two billion, one hundred million, five hundred forty-two thousand, four hundred forty".