20315122 has 8 divisors (see below), whose sum is σ = 30493872. Its totient is φ = 10150500.

The previous prime is 20315117. The next prime is 20315129. The reversal of 20315122 is 22151302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20315096 and 20315105.

It is not an unprimeable number, because it can be changed into a prime (20315129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (3811734).

Almost surely, 2^20315122 is an apocalyptic number.

20315122 is a deficient number, since it is larger than the sum of its proper divisors (10178750).

20315122 is a wasteful number, since it uses less digits than its factorization.

20315122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20315122 is about 4507.2299697264. The cubic root of 20315122 is about 272.8599602895.

Adding to 20315122 its reverse (22151302), we get a palindrome (42466424).

The spelling of 20315122 in words is "twenty million, three hundred fifteen thousand, one hundred twenty-two".