22520436 has 12 divisors (see below), whose sum is σ = 52547712. Its totient is φ = 7506808.

The previous prime is 22520431. The next prime is 22520437. The reversal of 22520436 is 63402522.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22520431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938340 + ... + 938363.

It is an arithmetic number, because the mean of its divisors is an integer number (4378976).

Almost surely, 2^22520436 is an apocalyptic number.

It is an amenable number.

22520436 is an abundant number, since it is smaller than the sum of its proper divisors (30027276).

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

22520436 is a wasteful number, since it uses less digits than its factorization.

22520436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876710 (or 1876708 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22520436 is about 4745.5701448825. The cubic root of 22520436 is about 282.3962539662.

Adding to 22520436 its reverse (63402522), we get a palindrome (85922958).

The spelling of 22520436 in words is "twenty-two million, five hundred twenty thousand, four hundred thirty-six".