22691638 has 8 divisors (see below), whose sum is σ = 34070040. Its totient is φ = 11334960.

The previous prime is 22691633. The next prime is 22691653. The reversal of 22691638 is 83619622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22691597 and 22691606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22691633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2503 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (4258755).

Almost surely, 2^22691638 is an apocalyptic number.

22691638 is a deficient number, since it is larger than the sum of its proper divisors (11378402).

22691638 is a wasteful number, since it uses less digits than its factorization.

22691638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10862.

The product of its digits is 31104, while the sum is 37.

The square root of 22691638 is about 4763.5740783576. The cubic root of 22691638 is about 283.1100472264.

The spelling of 22691638 in words is "twenty-two million, six hundred ninety-one thousand, six hundred thirty-eight".