22099810 has 16 divisors (see below), whose sum is σ = 40175352. Its totient is φ = 8752000.

The previous prime is 22099789. The next prime is 22099811. The reversal of 22099810 is 1899022.

It can be written as a sum of positive squares in 4 ways, for example, as 16638241 + 5461569 = 4079^2 + 2337^2 .

It is a super-2 number, since 2×22099810² = 976803204072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22099811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9931 + ... + 11950.

Almost surely, 2^22099810 is an apocalyptic number.

22099810 is a deficient number, since it is larger than the sum of its proper divisors (18075542).

22099810 is a wasteful number, since it uses less digits than its factorization.

22099810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21989.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 22099810 is about 4701.0435011814. The cubic root of 22099810 is about 280.6270386242.

The spelling of 22099810 in words is "twenty-two million, ninety-nine thousand, eight hundred ten".