20012013 has 12 divisors (see below), whose sum is σ = 33035808. Its totient is φ = 11435400.

The previous prime is 20012011. The next prime is 20012023. The reversal of 20012013 is 31021002.

It is a happy number.

It is not a de Polignac number, because 20012013 - 2¹ = 20012011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20011986 and 20012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158763 + ... + 158888.

It is an arithmetic number, because the mean of its divisors is an integer number (2752984).

Almost surely, 2^20012013 is an apocalyptic number.

It is an amenable number.

20012013 is a deficient number, since it is larger than the sum of its proper divisors (13023795).

20012013 is a wasteful number, since it uses less digits than its factorization.

20012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317664 (or 317661 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20012013 is about 4473.4788476084. The cubic root of 20012013 is about 271.4960979466.

Adding to 20012013 its reverse (31021002), we get a palindrome (51033015).

The spelling of 20012013 in words is "twenty million, twelve thousand, thirteen".