22909645 has 16 divisors (see below), whose sum is σ = 30443328. Its totient is φ = 16410240.

The previous prime is 22909643. The next prime is 22909661. The reversal of 22909645 is 54690922.

It is not a de Polignac number, because 22909645 - 2¹ = 22909643 is a prime.

It is a super-3 number, since 3×22909645³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22909643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (1902708).

Almost surely, 2^22909645 is an apocalyptic number.

It is an amenable number.

22909645 is a deficient number, since it is larger than the sum of its proper divisors (7533683).

22909645 is a wasteful number, since it uses less digits than its factorization.

22909645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6300.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 22909645 is about 4786.4020934309. The cubic root of 22909645 is about 284.0138069397.

It can be divided in two parts, 2290 and 9645, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 22909645 in words is "twenty-two million, nine hundred nine thousand, six hundred forty-five".