22904644244021 has 4 divisors (see below), whose sum is σ = 22935892054092. Its totient is φ = 22873396433952.

The previous prime is 22904644244003. The next prime is 22904644244047. The reversal of 22904644244021 is 12044244640922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21977109600625 + 927534643396 = 4687975^2 + 963086^2 .

It is a cyclic number.

It is not a de Polignac number, because 22904644244021 - 2³⁸ = 22629766337077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22904644244081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15623903936 + ... + 15623905401.

It is an arithmetic number, because the mean of its divisors is an integer number (5733973013523).

Almost surely, 2^{22904644244021} is an apocalyptic number.

It is an amenable number.

22904644244021 is a deficient number, since it is larger than the sum of its proper divisors (31247810071).

22904644244021 is an equidigital number, since it uses as much as digits as its factorization.

22904644244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31247810070.

The product of its (nonzero) digits is 884736, while the sum is 44.

Adding to 22904644244021 its reverse (12044244640922), we get a palindrome (34948888884943).

The spelling of 22904644244021 in words is "twenty-two trillion, nine hundred four billion, six hundred forty-four million, two hundred forty-four thousand, twenty-one".