22505870 has 16 divisors (see below), whose sum is σ = 40581648. Its totient is φ = 8986560.

The previous prime is 22505869. The next prime is 22505881. The reversal of 22505870 is 7850522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5282 + ... + 8538.

It is an arithmetic number, because the mean of its divisors is an integer number (2536353).

Almost surely, 2^22505870 is an apocalyptic number.

22505870 is a deficient number, since it is larger than the sum of its proper divisors (18075778).

22505870 is a wasteful number, since it uses less digits than its factorization.

22505870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 22505870 is about 4744.0352022303. The cubic root of 22505870 is about 282.3353571140.

The spelling of 22505870 in words is "twenty-two million, five hundred five thousand, eight hundred seventy".