22629905 has 4 divisors (see below), whose sum is σ = 27155892. Its totient is φ = 18103920.

The previous prime is 22629899. The next prime is 22629913. The reversal of 22629905 is 50992622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13315201 + 9314704 = 3649^2 + 3052^2 .

It is not a de Polignac number, because 22629905 - 2²² = 18435601 is a prime.

It is a super-2 number, since 2×22629905² = 1024225200618050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262986 + ... + 2262995.

It is an arithmetic number, because the mean of its divisors is an integer number (6788973).

Almost surely, 2^22629905 is an apocalyptic number.

It is an amenable number.

22629905 is a deficient number, since it is larger than the sum of its proper divisors (4525987).

22629905 is an equidigital number, since it uses as much as digits as its factorization.

22629905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525986.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 22629905 is about 4757.0899718210. The cubic root of 22629905 is about 282.8530787698.

It can be divided in two parts, 2262 and 9905, that added together give a cube (12167 = 23³).

The spelling of 22629905 in words is "twenty-two million, six hundred twenty-nine thousand, nine hundred five".