20313202342421 has 32 divisors (see below), whose sum is σ = 22101649489920. Its totient is φ = 18598369305600.

The previous prime is 20313202342313. The next prime is 20313202342523. The reversal of 20313202342421 is 12424320231302.

It is not a de Polignac number, because 20313202342421 - 2³⁰ = 20312128600597 is a prime.

It is a super-2 number, since 2×20313202342421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313202342921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1639345136 + ... + 1639357526.

It is an arithmetic number, because the mean of its divisors is an integer number (690676546560).

Almost surely, 2^{20313202342421} is an apocalyptic number.

It is an amenable number.

20313202342421 is a deficient number, since it is larger than the sum of its proper divisors (1788447147499).

20313202342421 is a wasteful number, since it uses less digits than its factorization.

20313202342421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15945.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20313202342421 its reverse (12424320231302), we get a palindrome (32737522573723).

The spelling of 20313202342421 in words is "twenty trillion, three hundred thirteen billion, two hundred two million, three hundred forty-two thousand, four hundred twenty-one".