20021001013 has 16 divisors (see below), whose sum is σ = 21853250496. Its totient is φ = 18231932160.

The previous prime is 20021000981. The next prime is 20021001029. The reversal of 20021001013 is 31010012002.

It is not a de Polignac number, because 20021001013 - 2⁵ = 20021000981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021001313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305370 + ... + 365092.

It is an arithmetic number, because the mean of its divisors is an integer number (1365828156).

Almost surely, 2^20021001013 is an apocalyptic number.

It is an amenable number.

20021001013 is a deficient number, since it is larger than the sum of its proper divisors (1832249483).

20021001013 is a wasteful number, since it uses less digits than its factorization.

20021001013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60084.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20021001013 its reverse (31010012002), we get a palindrome (51031013015).

The spelling of 20021001013 in words is "twenty billion, twenty-one million, one thousand, thirteen".