20012112993 has 4 divisors (see below), whose sum is σ = 26682817328. Its totient is φ = 13341408660.

The previous prime is 20012112979. The next prime is 20012113007. The reversal of 20012112993 is 39921121002.

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 an interprime number because it is at equal distance from previous prime (20012112979) and next prime (20012113007).

It is not a de Polignac number, because 20012112993 - 2¹⁶ = 20012047457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012112993.

It is not an unprimeable number, because it can be changed into a prime (20012112943) 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, 3335352163 + ... + 3335352168.

It is an arithmetic number, because the mean of its divisors is an integer number (6670704332).

Almost surely, 2^20012112993 is an apocalyptic number.

It is an amenable number.

20012112993 is a deficient number, since it is larger than the sum of its proper divisors (6670704335).

20012112993 is an equidigital number, since it uses as much as digits as its factorization.

20012112993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670704334.

The product of its (nonzero) digits is 1944, while the sum is 30.

Adding to 20012112993 its reverse (39921121002), we get a palindrome (59933233995).

The spelling of 20012112993 in words is "twenty billion, twelve million, one hundred twelve thousand, nine hundred ninety-three".