22426381 has 2 divisors, whose sum is σ = 22426382. Its totient is φ = 22426380.

The previous prime is 22426337. The next prime is 22426409. The reversal of 22426381 is 18362422.

It is an a-pointer prime, because the next prime (22426409) can be obtained adding 22426381 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22410756 + 15625 = 4734^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 22426381 - 2⁷ = 22426253 is a prime.

It is a super-2 number, since 2×22426381² = 1005885129514322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22426321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11213190 + 11213191.

It is an arithmetic number, because the mean of its divisors is an integer number (11213191).

Almost surely, 2^22426381 is an apocalyptic number.

It is an amenable number.

22426381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22426381 is an equidigital number, since it uses as much as digits as its factorization.

22426381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

The square root of 22426381 is about 4735.6500081826. The cubic root of 22426381 is about 282.0025694315.

The spelling of 22426381 in words is "twenty-two million, four hundred twenty-six thousand, three hundred eighty-one".