20120993 has 2 divisors, whose sum is σ = 20120994. Its totient is φ = 20120992.

The previous prime is 20120959. The next prime is 20120999. The reversal of 20120993 is 39902102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17909824 + 2211169 = 4232^2 + 1487^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120993 - 2¹⁰ = 20119969 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060496 + 10060497.

It is an arithmetic number, because the mean of its divisors is an integer number (10060497).

Almost surely, 2^20120993 is an apocalyptic number.

It is an amenable number.

20120993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120993 is an equidigital number, since it uses as much as digits as its factorization.

20120993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 20120993 is about 4485.6429862395. The cubic root of 20120993 is about 271.9880374280.

It can be divided in two parts, 2012099 and 3, that added together give a palindrome (2012102).

The spelling of 20120993 in words is "twenty million, one hundred twenty thousand, nine hundred ninety-three".