20311233100453 has 2 divisors, whose sum is σ = 20311233100454. Its totient is φ = 20311233100452.

The previous prime is 20311233100397. The next prime is 20311233100469. The reversal of 20311233100453 is 35400133211302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17289313273764 + 3021919826689 = 4158042^2 + 1738367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311233100453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311233100253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155616550226 + 10155616550227.

It is an arithmetic number, because the mean of its divisors is an integer number (10155616550227).

Almost surely, 2^{20311233100453} is an apocalyptic number.

It is an amenable number.

20311233100453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311233100453 is an equidigital number, since it uses as much as digits as its factorization.

20311233100453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 20311233100453 its reverse (35400133211302), we get a palindrome (55711366311755).

The spelling of 20311233100453 in words is "twenty trillion, three hundred eleven billion, two hundred thirty-three million, one hundred thousand, four hundred fifty-three".