20120152993 has 2 divisors, whose sum is σ = 20120152994. Its totient is φ = 20120152992.

The previous prime is 20120152939. The next prime is 20120153057. The reversal of 20120152993 is 39925102102.

Together with previous prime (20120152939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19694473569 + 425679424 = 140337^2 + 20632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120152993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120159993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060076496 + 10060076497.

It is an arithmetic number, because the mean of its divisors is an integer number (10060076497).

Almost surely, 2^20120152993 is an apocalyptic number.

It is an amenable number.

20120152993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120152993 is an equidigital number, since it uses as much as digits as its factorization.

20120152993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 20120152993 in words is "twenty billion, one hundred twenty million, one hundred fifty-two thousand, nine hundred ninety-three".