20601386999 has 2 divisors, whose sum is σ = 20601387000. Its totient is φ = 20601386998.

The previous prime is 20601386977. The next prime is 20601387007. The reversal of 20601386999 is 99968310602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20601386999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20601386999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20601386969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300693499 + 10300693500.

It is an arithmetic number, because the mean of its divisors is an integer number (10300693500).

Almost surely, 2^20601386999 is an apocalyptic number.

20601386999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20601386999 is an equidigital number, since it uses as much as digits as its factorization.

20601386999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 20601386999 in words is "twenty billion, six hundred one million, three hundred eighty-six thousand, nine hundred ninety-nine".