22040804021 has 8 divisors (see below), whose sum is σ = 23044296960. Its totient is φ = 21041077552.

The previous prime is 22040803979. The next prime is 22040804029. The reversal of 22040804021 is 12040804022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22040804021 - 2²⁶ = 21973695157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22040804029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929645 + ... + 953058.

It is an arithmetic number, because the mean of its divisors is an integer number (2880537120).

Almost surely, 2^22040804021 is an apocalyptic number.

It is an amenable number.

22040804021 is a deficient number, since it is larger than the sum of its proper divisors (1003492939).

22040804021 is a wasteful number, since it uses less digits than its factorization.

22040804021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883235.

The product of its (nonzero) digits is 1024, while the sum is 23.

Subtracting from 22040804021 its reverse (12040804022), we obtain a palindrome (9999999999).

The spelling of 22040804021 in words is "twenty-two billion, forty million, eight hundred four thousand, twenty-one".