22146891 has 16 divisors (see below), whose sum is σ = 32012064. Its totient is φ = 13538304.

The previous prime is 22146871. The next prime is 22146893. The reversal of 22146891 is 19864122.

It is not a de Polignac number, because 22146891 - 2⁹ = 22146379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22146893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4315 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (2000754).

Almost surely, 2^22146891 is an apocalyptic number.

22146891 is a deficient number, since it is larger than the sum of its proper divisors (9865173).

22146891 is a wasteful number, since it uses less digits than its factorization.

22146891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790.

The product of its digits is 6912, while the sum is 33.

The square root of 22146891 is about 4706.0483422931. The cubic root of 22146891 is about 280.8261780490.

The spelling of 22146891 in words is "twenty-two million, one hundred forty-six thousand, eight hundred ninety-one".