22921894 has 4 divisors (see below), whose sum is σ = 34382844. Its totient is φ = 11460946.

The previous prime is 22921891. The next prime is 22921897. The reversal of 22921894 is 49812922.

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

It is an interprime number because it is at equal distance from previous prime (22921891) and next prime (22921897).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22921891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5730472 + ... + 5730475.

It is an arithmetic number, because the mean of its divisors is an integer number (8595711).

Almost surely, 2^22921894 is an apocalyptic number.

22921894 is a deficient number, since it is larger than the sum of its proper divisors (11460950).

22921894 is a wasteful number, since it uses less digits than its factorization.

22921894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460949.

The product of its digits is 20736, while the sum is 37.

The square root of 22921894 is about 4787.6814848108. The cubic root of 22921894 is about 284.0644153958.

It can be divided in two parts, 2292 and 1894, that added together give a triangular number (4186 = T₉₁).

The spelling of 22921894 in words is "twenty-two million, nine hundred twenty-one thousand, eight hundred ninety-four".