22520340 has 36 divisors (see below), whose sum is σ = 68312244. Its totient is φ = 6005376.

The previous prime is 22520321. The next prime is 22520387. The reversal of 22520340 is 4302522.

It can be written as a sum of positive squares in 2 ways, for example, as 3283344 + 19236996 = 1812^2 + 4386^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62377 + ... + 62736.

Almost surely, 2^22520340 is an apocalyptic number.

22520340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22520340 is an abundant number, since it is smaller than the sum of its proper divisors (45791904).

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

22520340 is a wasteful number, since it uses less digits than its factorization.

22520340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125128 (or 125123 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22520340 is about 4745.5600301756. The cubic root of 22520340 is about 282.3958526999.

Adding to 22520340 its reverse (4302522), we get a palindrome (26822862).

The spelling of 22520340 in words is "twenty-two million, five hundred twenty thousand, three hundred forty".