20312522 has 4 divisors (see below), whose sum is σ = 30468786. Its totient is φ = 10156260.

The previous prime is 20312497. The next prime is 20312531. The reversal of 20312522 is 22521302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22521302 = 2 ⋅11260651.

It can be written as a sum of positive squares in only one way, i.e., 18567481 + 1745041 = 4309^2 + 1321^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20312522.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078129 + ... + 5078132.

Almost surely, 2^20312522 is an apocalyptic number.

20312522 is a deficient number, since it is larger than the sum of its proper divisors (10156264).

20312522 is a wasteful number, since it uses less digits than its factorization.

20312522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156263.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20312522 is about 4506.9415350102. The cubic root of 20312522 is about 272.8483192704.

Adding to 20312522 its reverse (22521302), we get a palindrome (42833824).

The spelling of 20312522 in words is "twenty million, three hundred twelve thousand, five hundred twenty-two".