22506870 has 16 divisors (see below), whose sum is σ = 54016560. Its totient is φ = 6001824.

The previous prime is 22506859. The next prime is 22506881. The reversal of 22506870 is 7860522.

It is an interprime number because it is at equal distance from previous prime (22506859) and next prime (22506881).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 750229 = 22506870 / (2 + 2 + 5 + 0 + 6 + 8 + 7 + 0).

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, 375085 + ... + 375144.

It is an arithmetic number, because the mean of its divisors is an integer number (3376035).

Almost surely, 2^22506870 is an apocalyptic number.

22506870 is an abundant number, since it is smaller than the sum of its proper divisors (31509690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22506870 is a wasteful number, since it uses less digits than its factorization.

22506870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750239.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 22506870 is about 4744.1405965675. The cubic root of 22506870 is about 282.3395387072.

The spelling of 22506870 in words is "twenty-two million, five hundred six thousand, eight hundred seventy".