22091029 has 4 divisors (see below), whose sum is σ = 22128876. Its totient is φ = 22053184.

The previous prime is 22091021. The next prime is 22091033. The reversal of 22091029 is 92019022.

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 19562929 + 2528100 = 4423^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 22091029 - 2³ = 22091021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22090994 and 22091012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22091021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18034 + ... + 19219.

It is an arithmetic number, because the mean of its divisors is an integer number (5532219).

Almost surely, 2^22091029 is an apocalyptic number.

It is an amenable number.

22091029 is a deficient number, since it is larger than the sum of its proper divisors (37847).

22091029 is an equidigital number, since it uses as much as digits as its factorization.

22091029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37846.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 22091029 is about 4700.1094668103. The cubic root of 22091029 is about 280.5898661709.

The spelling of 22091029 in words is "twenty-two million, ninety-one thousand, twenty-nine".