20021200013 has 16 divisors (see below), whose sum is σ = 20574238464. Its totient is φ = 19473787200.

The previous prime is 20021199977. The next prime is 20021200021. The reversal of 20021200013 is 31000212002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20021200013 - 2¹⁶ = 20021134477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021199967 and 20021200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021200813) 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, 7477631 + ... + 7480307.

It is an arithmetic number, because the mean of its divisors is an integer number (1285889904).

Almost surely, 2^20021200013 is an apocalyptic number.

It is an amenable number.

20021200013 is a deficient number, since it is larger than the sum of its proper divisors (553038451).

20021200013 is a wasteful number, since it uses less digits than its factorization.

20021200013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20021200013 its reverse (31000212002), we get a palindrome (51021412015).

The spelling of 20021200013 in words is "twenty billion, twenty-one million, two hundred thousand, thirteen".