22113945 has 48 divisors (see below), whose sum is σ = 45745920. Its totient is φ = 10106208.

The previous prime is 22113941. The next prime is 22113961. The reversal of 22113945 is 54931122.

It is not a de Polignac number, because 22113945 - 2² = 22113941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22113941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4944 + ... + 8286.

It is an arithmetic number, because the mean of its divisors is an integer number (953040).

Almost surely, 2^22113945 is an apocalyptic number.

It is an amenable number.

22113945 is an abundant number, since it is smaller than the sum of its proper divisors (23631975).

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

22113945 is a wasteful number, since it uses less digits than its factorization.

22113945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371 (or 3358 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 22113945 is about 4702.5466504863. The cubic root of 22113945 is about 280.6868553949.

The spelling of 22113945 in words is "twenty-two million, one hundred thirteen thousand, nine hundred forty-five".