20131013021 has 8 divisors (see below), whose sum is σ = 23628679680. Its totient is φ = 16788798288.

The previous prime is 20131013011. The next prime is 20131013033. The reversal of 20131013021 is 12031013102.

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

It is a cyclic number.

It is not a de Polignac number, because 20131013021 - 2³⁴ = 2951143837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20131012987 and 20131013005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131013011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38862701 + ... + 38863218.

It is an arithmetic number, because the mean of its divisors is an integer number (2953584960).

Almost surely, 2^20131013021 is an apocalyptic number.

It is an amenable number.

20131013021 is a deficient number, since it is larger than the sum of its proper divisors (3497666659).

20131013021 is an equidigital number, since it uses as much as digits as its factorization.

20131013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77725963.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20131013021 its reverse (12031013102), we get a palindrome (32162026123).

The spelling of 20131013021 in words is "twenty billion, one hundred thirty-one million, thirteen thousand, twenty-one".