20120999993 has 2 divisors, whose sum is σ = 20120999994. Its totient is φ = 20120999992.

The previous prime is 20120999947. The next prime is 20121000013. The reversal of 20120999993 is 39999902102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17824386064 + 2296613929 = 133508^2 + 47923^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120999993 - 2¹⁰ = 20120998969 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120999293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060499996 + 10060499997.

It is an arithmetic number, because the mean of its divisors is an integer number (10060499997).

Almost surely, 2^20120999993 is an apocalyptic number.

It is an amenable number.

20120999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120999993 is an equidigital number, since it uses as much as digits as its factorization.

20120999993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 53.

The spelling of 20120999993 in words is "twenty billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred ninety-three".