22381739 has 2 divisors, whose sum is σ = 22381740. Its totient is φ = 22381738.

The previous prime is 22381717. The next prime is 22381757. The reversal of 22381739 is 93718322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22381739 - 2⁸ = 22381483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22381699 and 22381708.

It is not a weakly prime, because it can be changed into another prime (22381759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11190869 + 11190870.

It is an arithmetic number, because the mean of its divisors is an integer number (11190870).

Almost surely, 2^22381739 is an apocalyptic number.

22381739 is a deficient number, since it is larger than the sum of its proper divisors (1).

22381739 is an equidigital number, since it uses as much as digits as its factorization.

22381739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 22381739 is about 4730.9342629126. The cubic root of 22381739 is about 281.8153268370.

The spelling of 22381739 in words is "twenty-two million, three hundred eighty-one thousand, seven hundred thirty-nine".