21889560937 has 2 divisors, whose sum is σ = 21889560938. Its totient is φ = 21889560936.

The previous prime is 21889560883. The next prime is 21889560941. The reversal of 21889560937 is 73906598812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15562313001 + 6327247936 = 124749^2 + 79544^2 .

It is a cyclic number.

It is not a de Polignac number, because 21889560937 - 2⁷ = 21889560809 is a prime.

It is not a weakly prime, because it can be changed into another prime (21889560967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10944780468 + 10944780469.

It is an arithmetic number, because the mean of its divisors is an integer number (10944780469).

Almost surely, 2^21889560937 is an apocalyptic number.

It is an amenable number.

21889560937 is a deficient number, since it is larger than the sum of its proper divisors (1).

21889560937 is an equidigital number, since it uses as much as digits as its factorization.

21889560937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 21889560937 in words is "twenty-one billion, eight hundred eighty-nine million, five hundred sixty thousand, nine hundred thirty-seven".