22129494 has 32 divisors (see below), whose sum is σ = 46332000. Its totient is φ = 7037184.

The previous prime is 22129423. The next prime is 22129501. The reversal of 22129494 is 49492122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 14772 + ... + 16200.

It is an arithmetic number, because the mean of its divisors is an integer number (1447875).

Almost surely, 2^22129494 is an apocalyptic number.

22129494 is an abundant number, since it is smaller than the sum of its proper divisors (24202506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22129494 is a wasteful number, since it uses less digits than its factorization.

22129494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its digits is 10368, while the sum is 33.

The square root of 22129494 is about 4704.1996131117. The cubic root of 22129494 is about 280.7526265241.

The spelling of 22129494 in words is "twenty-two million, one hundred twenty-nine thousand, four hundred ninety-four".