20312312253 has 16 divisors (see below), whose sum is σ = 28273069440. Its totient is φ = 12947067584.

The previous prime is 20312312243. The next prime is 20312312287. The reversal of 20312312253 is 35221321302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20312312253 - 2⁵ = 20312312221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312312243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95575 + ... + 223067.

It is an arithmetic number, because the mean of its divisors is an integer number (1767066840).

Almost surely, 2^20312312253 is an apocalyptic number.

20312312253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20312312253 is a deficient number, since it is larger than the sum of its proper divisors (7960757187).

20312312253 is a wasteful number, since it uses less digits than its factorization.

20312312253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129828.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 20312312253 its reverse (35221321302), we get a palindrome (55533633555).

The spelling of 20312312253 in words is "twenty billion, three hundred twelve million, three hundred twelve thousand, two hundred fifty-three".