21583874330373 has 4 divisors (see below), whose sum is σ = 28778499107168. Its totient is φ = 14389249553580.

The previous prime is 21583874330351. The next prime is 21583874330377. The reversal of 21583874330373 is 37303347838512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21583874330373 - 2⁶ = 21583874330309 is a prime.

It is a super-2 number, since 2×21583874330373² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21583874330377) 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, 3597312388393 + ... + 3597312388398.

It is an arithmetic number, because the mean of its divisors is an integer number (7194624776792).

Almost surely, 2^{21583874330373} is an apocalyptic number.

It is an amenable number.

21583874330373 is a deficient number, since it is larger than the sum of its proper divisors (7194624776795).

21583874330373 is an equidigital number, since it uses as much as digits as its factorization.

21583874330373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194624776794.

The product of its (nonzero) digits is 30481920, while the sum is 57.

The spelling of 21583874330373 in words is "twenty-one trillion, five hundred eighty-three billion, eight hundred seventy-four million, three hundred thirty thousand, three hundred seventy-three".