22037881 has 2 divisors, whose sum is σ = 22037882. Its totient is φ = 22037880.

The previous prime is 22037879. The next prime is 22037893. The reversal of 22037881 is 18873022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 32400 = 4691^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 22037881 - 2¹ = 22037879 is a prime.

It is a super-2 number, since 2×22037881² = 971336397940322, which contains 22 as substring.

Together with 22037879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22037861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11018940 + 11018941.

It is an arithmetic number, because the mean of its divisors is an integer number (11018941).

Almost surely, 2^22037881 is an apocalyptic number.

It is an amenable number.

22037881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22037881 is an equidigital number, since it uses as much as digits as its factorization.

22037881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 22037881 is about 4694.4521512100. The cubic root of 22037881 is about 280.3646651689.

The spelling of 22037881 in words is "twenty-two million, thirty-seven thousand, eight hundred eighty-one".