22837981 has 4 divisors (see below), whose sum is σ = 24040000. Its totient is φ = 21635964.

The previous prime is 22837963. The next prime is 22837999. The reversal of 22837981 is 18973822.

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 an interprime number because it is at equal distance from previous prime (22837963) and next prime (22837999).

It is a cyclic number.

It is not a de Polignac number, because 22837981 - 2⁵ = 22837949 is a prime.

It is a super-2 number, since 2×22837981² = 1043146752312722, which 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 (22837921) 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, 600981 + ... + 601018.

It is an arithmetic number, because the mean of its divisors is an integer number (6010000).

Almost surely, 2^22837981 is an apocalyptic number.

It is an amenable number.

22837981 is a deficient number, since it is larger than the sum of its proper divisors (1202019).

22837981 is a wasteful number, since it uses less digits than its factorization.

22837981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202018.

The product of its digits is 48384, while the sum is 40.

The square root of 22837981 is about 4778.9100221703. The cubic root of 22837981 is about 283.7173550132.

The spelling of 22837981 in words is "twenty-two million, eight hundred thirty-seven thousand, nine hundred eighty-one".