20012553213 has 4 divisors (see below), whose sum is σ = 26683404288. Its totient is φ = 13341702140.

The previous prime is 20012553163. The next prime is 20012553241. The reversal of 20012553213 is 31235521002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20012553213 - 2¹⁷ = 20012422141 is a prime.

It is a super-2 number, since 2×20012553213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012553293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335425533 + ... + 3335425538.

It is an arithmetic number, because the mean of its divisors is an integer number (6670851072).

Almost surely, 2^20012553213 is an apocalyptic number.

It is an amenable number.

20012553213 is a deficient number, since it is larger than the sum of its proper divisors (6670851075).

20012553213 is an equidigital number, since it uses as much as digits as its factorization.

20012553213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670851074.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 20012553213 in words is "twenty billion, twelve million, five hundred fifty-three thousand, two hundred thirteen".