22691764 has 12 divisors (see below), whose sum is σ = 39860100. Its totient is φ = 11303168.

The previous prime is 22691759. The next prime is 22691807. The reversal of 22691764 is 46719622.

It can be written as a sum of positive squares in 2 ways, for example, as 13032100 + 9659664 = 3610^2 + 3108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9469 + ... + 11620.

It is an arithmetic number, because the mean of its divisors is an integer number (3321675).

Almost surely, 2^22691764 is an apocalyptic number.

It is an amenable number.

22691764 is a deficient number, since it is larger than the sum of its proper divisors (17168336).

22691764 is a wasteful number, since it uses less digits than its factorization.

22691764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21362 (or 21360 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 22691764 is about 4763.5873037030. The cubic root of 22691764 is about 283.1105712344.

It can be divided in two parts, 226917 and 64, that added together give a cube (226981 = 61³).

The spelling of 22691764 in words is "twenty-two million, six hundred ninety-one thousand, seven hundred sixty-four".