22021555373 has 4 divisors (see below), whose sum is σ = 22216436508. Its totient is φ = 21826674240.

The previous prime is 22021555363. The next prime is 22021555379. The reversal of 22021555373 is 37355512022.

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 3764681449 + 18256873924 = 61357^2 + 135118^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021555373 - 2⁸ = 22021555117 is a prime.

It is a super-2 number, since 2×22021555373² (a number of 21 digits) contains 22 as substring.

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 (22021555379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97440398 + ... + 97440623.

It is an arithmetic number, because the mean of its divisors is an integer number (5554109127).

Almost surely, 2^22021555373 is an apocalyptic number.

It is an amenable number.

22021555373 is a deficient number, since it is larger than the sum of its proper divisors (194881135).

22021555373 is a wasteful number, since it uses less digits than its factorization.

22021555373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194881134.

The product of its (nonzero) digits is 63000, while the sum is 35.

The spelling of 22021555373 in words is "twenty-two billion, twenty-one million, five hundred fifty-five thousand, three hundred seventy-three".