22138927 has 4 divisors (see below), whose sum is σ = 22610016. Its totient is φ = 21667840.

The previous prime is 22138889. The next prime is 22138931. The reversal of 22138927 is 72983122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22138927 - 2¹⁵ = 22106159 is a prime.

It is a super-2 number, since 2×22138927² = 980264177422658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22138892 and 22138901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138957) 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, 235474 + ... + 235567.

It is an arithmetic number, because the mean of its divisors is an integer number (5652504).

Almost surely, 2^22138927 is an apocalyptic number.

22138927 is a deficient number, since it is larger than the sum of its proper divisors (471089).

22138927 is an equidigital number, since it uses as much as digits as its factorization.

22138927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471088.

The product of its digits is 12096, while the sum is 34.

The square root of 22138927 is about 4705.2021210571. The cubic root of 22138927 is about 280.7925124085.

The spelling of 22138927 in words is "twenty-two million, one hundred thirty-eight thousand, nine hundred twenty-seven".