20013021323 has 16 divisors (see below), whose sum is σ = 20789747712. Its totient is φ = 19244736000.

The previous prime is 20013021319. The next prime is 20013021331. The reversal of 20013021323 is 32312031002.

It is a cyclic number.

It is not a de Polignac number, because 20013021323 - 2² = 20013021319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013021313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7722758 + ... + 7725348.

It is an arithmetic number, because the mean of its divisors is an integer number (1299359232).

Almost surely, 2^20013021323 is an apocalyptic number.

20013021323 is a deficient number, since it is larger than the sum of its proper divisors (776726389).

20013021323 is a wasteful number, since it uses less digits than its factorization.

20013021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20013021323 its reverse (32312031002), we get a palindrome (52325052325).

The spelling of 20013021323 in words is "twenty billion, thirteen million, twenty-one thousand, three hundred twenty-three".