20315826 has 32 divisors (see below), whose sum is σ = 47524800. Its totient is φ = 6415200.

The previous prime is 20315821. The next prime is 20315839. The reversal of 20315826 is 62851302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20315826.

It is not an unprimeable number, because it can be changed into a prime (20315821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8875 + ... + 10926.

It is an arithmetic number, because the mean of its divisors is an integer number (1485150).

Almost surely, 2^20315826 is an apocalyptic number.

20315826 is an abundant number, since it is smaller than the sum of its proper divisors (27208974).

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

20315826 is a wasteful number, since it uses less digits than its factorization.

20315826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19831 (or 19825 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20315826 is about 4507.3080657971. The cubic root of 20315826 is about 272.8631121483.

The spelling of 20315826 in words is "twenty million, three hundred fifteen thousand, eight hundred twenty-six".