22104520 has 32 divisors (see below), whose sum is σ = 49963320. Its totient is φ = 8801280.

The previous prime is 22104517. The next prime is 22104529. The reversal of 22104520 is 2540122.

It can be written as a sum of positive squares in 4 ways, for example, as 18096516 + 4008004 = 4254^2 + 2002^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22104494 and 22104503.

It is not an unprimeable number, because it can be changed into a prime (22104529) 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, 8494 + ... + 10786.

Almost surely, 2^22104520 is an apocalyptic number.

22104520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22104520 is an abundant number, since it is smaller than the sum of its proper divisors (27858800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22104520 is a wasteful number, since it uses less digits than its factorization.

22104520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22104520 is about 4701.5444271005. The cubic root of 22104520 is about 280.6469733275.

Adding to 22104520 its reverse (2540122), we get a palindrome (24644642).

It can be divided in two parts, 22 and 104520, that multiplied together give a triangular number (2299440 = T₂₁₄₄).

The spelling of 22104520 in words is "twenty-two million, one hundred four thousand, five hundred twenty".