22501693 has 4 divisors (see below), whose sum is σ = 23825340. Its totient is φ = 21178048.

The previous prime is 22501679. The next prime is 22501697. The reversal of 22501693 is 39610522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17994564 + 4507129 = 4242^2 + 2123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22501693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501697) 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, 661798 + ... + 661831.

It is an arithmetic number, because the mean of its divisors is an integer number (5956335).

Almost surely, 2^22501693 is an apocalyptic number.

It is an amenable number.

22501693 is a deficient number, since it is larger than the sum of its proper divisors (1323647).

22501693 is a wasteful number, since it uses less digits than its factorization.

22501693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323646.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 22501693 is about 4743.5949447650. The cubic root of 22501693 is about 282.3178892600.

The spelling of 22501693 in words is "twenty-two million, five hundred one thousand, six hundred ninety-three".