21313633214053 has 4 divisors (see below), whose sum is σ = 21553112239020. Its totient is φ = 21074154189088.

The previous prime is 21313633214039. The next prime is 21313633214089. The reversal of 21313633214053 is 35041233631312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9702215766244 + 11611417447809 = 3114838^2 + 3407553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21313633214053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313633217053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119739512350 + ... + 119739512527.

It is an arithmetic number, because the mean of its divisors is an integer number (5388278059755).

Almost surely, 2^{21313633214053} is an apocalyptic number.

It is an amenable number.

21313633214053 is a deficient number, since it is larger than the sum of its proper divisors (239479024967).

21313633214053 is an equidigital number, since it uses as much as digits as its factorization.

21313633214053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239479024966.

The product of its (nonzero) digits is 116640, while the sum is 37.

Adding to 21313633214053 its reverse (35041233631312), we get a palindrome (56354866845365).

The spelling of 21313633214053 in words is "twenty-one trillion, three hundred thirteen billion, six hundred thirty-three million, two hundred fourteen thousand, fifty-three".