22506645 has 32 divisors (see below), whose sum is σ = 41748480. Its totient is φ = 10140480.

The previous prime is 22506643. The next prime is 22506667. The reversal of 22506645 is 54660522.

It is not a de Polignac number, because 22506645 - 2¹ = 22506643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5946 + ... + 8964.

It is an arithmetic number, because the mean of its divisors is an integer number (1304640).

Almost surely, 2^22506645 is an apocalyptic number.

It is an amenable number.

22506645 is a deficient number, since it is larger than the sum of its proper divisors (19241835).

22506645 is a wasteful number, since it uses less digits than its factorization.

22506645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 22506645 is about 4744.1168830458. The cubic root of 22506645 is about 282.3385978595.

The spelling of 22506645 in words is "twenty-two million, five hundred six thousand, six hundred forty-five".