20021230013 has 4 divisors (see below), whose sum is σ = 20133080640. Its totient is φ = 19909379388.

The previous prime is 20021229997. The next prime is 20021230039. The reversal of 20021230013 is 31003212002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20021230013 - 2⁴ = 20021229997 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 20021230013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021230213) 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, 55925045 + ... + 55925402.

It is an arithmetic number, because the mean of its divisors is an integer number (5033270160).

Almost surely, 2^20021230013 is an apocalyptic number.

It is an amenable number.

20021230013 is a deficient number, since it is larger than the sum of its proper divisors (111850627).

20021230013 is a wasteful number, since it uses less digits than its factorization.

20021230013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111850626.

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

Adding to 20021230013 its reverse (31003212002), we get a palindrome (51024442015).

The spelling of 20021230013 in words is "twenty billion, twenty-one million, two hundred thirty thousand, thirteen".