22378423 has 2 divisors, whose sum is σ = 22378424. Its totient is φ = 22378422.

The previous prime is 22378397. The next prime is 22378429. The reversal of 22378423 is 32487322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22378423 - 2²¹ = 20281271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22378429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11189211 + 11189212.

It is an arithmetic number, because the mean of its divisors is an integer number (11189212).

Almost surely, 2^22378423 is an apocalyptic number.

22378423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22378423 is an equidigital number, since it uses as much as digits as its factorization.

22378423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 22378423 is about 4730.5837906119. The cubic root of 22378423 is about 281.8014085593.

It can be divided in two parts, 22378 and 423, that added together give a square (22801 = 151²).

The spelling of 22378423 in words is "twenty-two million, three hundred seventy-eight thousand, four hundred twenty-three".