20012013021 has 48 divisors (see below), whose sum is σ = 36465484608. Its totient is φ = 9596160000.

The previous prime is 20012013019. The next prime is 20012013083. The reversal of 20012013021 is 12031021002.

It is not a de Polignac number, because 20012013021 - 2¹ = 20012013019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012012988 and 20012013006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012013001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 454980 + ... + 497021.

It is an arithmetic number, because the mean of its divisors is an integer number (759697596).

Almost surely, 2^20012013021 is an apocalyptic number.

20012013021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20012013021 is a deficient number, since it is larger than the sum of its proper divisors (16453471587).

20012013021 is a wasteful number, since it uses less digits than its factorization.

20012013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952042 (or 952035 counting only the distinct ones).

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

Adding to 20012013021 its reverse (12031021002), we get a palindrome (32043034023).

The spelling of 20012013021 in words is "twenty billion, twelve million, thirteen thousand, twenty-one".