20021020113 has 16 divisors (see below), whose sum is σ = 26804699136. Its totient is φ = 13292387280.

The previous prime is 20021020111. The next prime is 20021020147. The reversal of 20021020113 is 31102012002.

It is not a de Polignac number, because 20021020113 - 2¹ = 20021020111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021020111) 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, 2815120 + ... + 2822222.

It is an arithmetic number, because the mean of its divisors is an integer number (1675293696).

Almost surely, 2^20021020113 is an apocalyptic number.

It is an amenable number.

20021020113 is a deficient number, since it is larger than the sum of its proper divisors (6783679023).

20021020113 is a wasteful number, since it uses less digits than its factorization.

20021020113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10844.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20021020113 its reverse (31102012002), we get a palindrome (51123032115).

The spelling of 20021020113 in words is "twenty billion, twenty-one million, twenty thousand, one hundred thirteen".