20311233100402 has 8 divisors (see below), whose sum is σ = 30476215430316. Its totient is φ = 10152494623632.

The previous prime is 20311233100397. The next prime is 20311233100453. The reversal of 20311233100402 is 20400133211302.

It can be written as a sum of positive squares in 2 ways, for example, as 19375852043601 + 935381056801 = 4401801^2 + 967151^2 .

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

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, 1560955153 + ... + 1560968164.

Almost surely, 2^{20311233100402} is an apocalyptic number.

20311233100402 is a deficient number, since it is larger than the sum of its proper divisors (10164982329914).

20311233100402 is a wasteful number, since it uses less digits than its factorization.

20311233100402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121926572.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20311233100402 its reverse (20400133211302), we get a palindrome (40711366311704).

The spelling of 20311233100402 in words is "twenty trillion, three hundred eleven billion, two hundred thirty-three million, one hundred thousand, four hundred two".