20199520807 has 2 divisors, whose sum is σ = 20199520808. Its totient is φ = 20199520806.

The previous prime is 20199520769. The next prime is 20199520841. The reversal of 20199520807 is 70802599102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20199520807 - 2¹⁵ = 20199488039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20199520867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10099760403 + 10099760404.

It is an arithmetic number, because the mean of its divisors is an integer number (10099760404).

Almost surely, 2^20199520807 is an apocalyptic number.

20199520807 is a deficient number, since it is larger than the sum of its proper divisors (1).

20199520807 is an equidigital number, since it uses as much as digits as its factorization.

20199520807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 20199520807 in words is "twenty billion, one hundred ninety-nine million, five hundred twenty thousand, eight hundred seven".