20231312 has 20 divisors (see below), whose sum is σ = 39430140. Its totient is φ = 10055808.

The previous prime is 20231303. The next prime is 20231339. The reversal of 20231312 is 21313202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 5973136 = 3776^2 + 2444^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887 + ... + 6422.

It is an arithmetic number, because the mean of its divisors is an integer number (1971507).

Almost surely, 2^20231312 is an apocalyptic number.

It is an amenable number.

20231312 is a deficient number, since it is larger than the sum of its proper divisors (19198828).

20231312 is a wasteful number, since it uses less digits than its factorization.

20231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490 (or 7484 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20231312 is about 4497.9230762653. The cubic root of 20231312 is about 272.4842153413.

Adding to 20231312 its reverse (21313202), we get a palindrome (41544514).

The spelling of 20231312 in words is "twenty million, two hundred thirty-one thousand, three hundred twelve".