20131312330 has 8 divisors (see below), whose sum is σ = 36236362212. Its totient is φ = 8052524928.

The previous prime is 20131312321. The next prime is 20131312343. The reversal of 20131312330 is 3321313102.

It can be written as a sum of positive squares in 2 ways, for example, as 18709041961 + 1422270369 = 136781^2 + 37713^2 .

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

It is a super-2 number, since 2×20131312330² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20131312298 and 20131312307.

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, 1006565607 + ... + 1006565626.

Almost surely, 2^20131312330 is an apocalyptic number.

20131312330 is a deficient number, since it is larger than the sum of its proper divisors (16105049882).

20131312330 is a wasteful number, since it uses less digits than its factorization.

20131312330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013131240.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20131312330 its reverse (3321313102), we get a palindrome (23452625432).

The spelling of 20131312330 in words is "twenty billion, one hundred thirty-one million, three hundred twelve thousand, three hundred thirty".