22806993 has 8 divisors (see below), whose sum is σ = 33173856. Its totient is φ = 13822400.

The previous prime is 22806991. The next prime is 22807009. The reversal of 22806993 is 39960822.

22806993 is nontrivially palindromic in base 8.

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

It is a cyclic number.

It is not a de Polignac number, because 22806993 - 2¹ = 22806991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22806991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345528 + ... + 345593.

It is an arithmetic number, because the mean of its divisors is an integer number (4146732).

Almost surely, 2^22806993 is an apocalyptic number.

It is an amenable number.

22806993 is a deficient number, since it is larger than the sum of its proper divisors (10366863).

22806993 is a wasteful number, since it uses less digits than its factorization.

22806993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691135.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 22806993 is about 4775.6667597310. Note that the first 3 decimals coincide. The cubic root of 22806993 is about 283.5889751179.

The spelling of 22806993 in words is "twenty-two million, eight hundred six thousand, nine hundred ninety-three".