22021111440 has 80 divisors (see below), whose sum is σ = 75850502400. Its totient is φ = 5872295808.

The previous prime is 22021111391. The next prime is 22021111471. The reversal of 22021111440 is 4411112022.

22021111440 is a `hidden beast` number, since 2 + 2 + 0 + 211 + 11 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 5095320 + ... + 5099639.

It is an arithmetic number, because the mean of its divisors is an integer number (948131280).

Almost surely, 2^22021111440 is an apocalyptic number.

22021111440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021111440 is an abundant number, since it is smaller than the sum of its proper divisors (53829390960).

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

22021111440 is a wasteful number, since it uses less digits than its factorization.

22021111440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10194981 (or 10194969 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22021111440 its reverse (4411112022), we get a palindrome (26432223462).

The spelling of 22021111440 in words is "twenty-two billion, twenty-one million, one hundred eleven thousand, four hundred forty".