22320657 has 16 divisors (see below), whose sum is σ = 33962880. Its totient is φ = 14477616.

The previous prime is 22320653. The next prime is 22320667. The reversal of 22320657 is 75602322.

22320657 is a `hidden beast` number, since 2 + 2 + 3 + 2 + 0 + 657 = 666.

It is not a de Polignac number, because 22320657 - 2² = 22320653 is a prime.

It is a super-3 number, since 3×22320657³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22320657.

It is not an unprimeable number, because it can be changed into a prime (22320653) 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, 10173 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (2122680).

Almost surely, 2^22320657 is an apocalyptic number.

22320657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22320657 is a deficient number, since it is larger than the sum of its proper divisors (11642223).

22320657 is a wasteful number, since it uses less digits than its factorization.

22320657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22389 (or 22383 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 22320657 is about 4724.4742564649. The cubic root of 22320657 is about 281.5587258790.

Adding to 22320657 its reverse (75602322), we get a palindrome (97922979).

The spelling of 22320657 in words is "twenty-two million, three hundred twenty thousand, six hundred fifty-seven".