22105690 has 8 divisors (see below), whose sum is σ = 39790260. Its totient is φ = 8842272.

The previous prime is 22105679. The next prime is 22105693. The reversal of 22105690 is 9650122.

It can be written as a sum of positive squares in 2 ways, for example, as 21874329 + 231361 = 4677^2 + 481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22105690² = 977323060752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22105693) 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, 1105275 + ... + 1105294.

Almost surely, 2^22105690 is an apocalyptic number.

22105690 is a deficient number, since it is larger than the sum of its proper divisors (17684570).

22105690 is a wasteful number, since it uses less digits than its factorization.

22105690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210576.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 22105690 is about 4701.6688526522. The cubic root of 22105690 is about 280.6519248211.

The spelling of 22105690 in words is "twenty-two million, one hundred five thousand, six hundred ninety".