20213020013 has 4 divisors (see below), whose sum is σ = 20214975648. Its totient is φ = 20211064380.

The previous prime is 20213019973. The next prime is 20213020063. The reversal of 20213020013 is 31002031202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31002031202 = 2 ⋅15501015601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213020013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20213020013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213020063) 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, 962231 + ... + 983012.

It is an arithmetic number, because the mean of its divisors is an integer number (5053743912).

Almost surely, 2^20213020013 is an apocalyptic number.

It is an amenable number.

20213020013 is a deficient number, since it is larger than the sum of its proper divisors (1955635).

20213020013 is a wasteful number, since it uses less digits than its factorization.

20213020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955634.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20213020013 its reverse (31002031202), we get a palindrome (51215051215).

The spelling of 20213020013 in words is "twenty billion, two hundred thirteen million, twenty thousand, thirteen".