20315234 has 16 divisors (see below), whose sum is σ = 31298400. Its totient is φ = 9885984.

The previous prime is 20315227. The next prime is 20315263. The reversal of 20315234 is 43251302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11822 + ... + 13430.

It is an arithmetic number, because the mean of its divisors is an integer number (1956150).

Almost surely, 2^20315234 is an apocalyptic number.

20315234 is a deficient number, since it is larger than the sum of its proper divisors (10983166).

20315234 is a wasteful number, since it uses less digits than its factorization.

20315234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20315234 is about 4507.2423941918. The cubic root of 20315234 is about 272.8604617264.

Adding to 20315234 its reverse (43251302), we get a palindrome (63566536).

The spelling of 20315234 in words is "twenty million, three hundred fifteen thousand, two hundred thirty-four".