20023021311013 has 4 divisors (see below), whose sum is σ = 22883452926880. Its totient is φ = 17162589695148.

The previous prime is 20023021310947. The next prime is 20023021311023. The reversal of 20023021311013 is 31011312032002.

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 a de Polignac number, because none of the positive numbers 2^k-20023021311013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023021311023) 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, 1430215807923 + ... + 1430215807936.

It is an arithmetic number, because the mean of its divisors is an integer number (5720863231720).

Almost surely, 2^{20023021311013} is an apocalyptic number.

It is an amenable number.

20023021311013 is a deficient number, since it is larger than the sum of its proper divisors (2860431615867).

20023021311013 is an equidigital number, since it uses as much as digits as its factorization.

20023021311013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860431615866.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20023021311013 its reverse (31011312032002), we get a palindrome (51034333343015).

The spelling of 20023021311013 in words is "twenty trillion, twenty-three billion, twenty-one million, three hundred eleven thousand, thirteen".