20185037699 has 2 divisors, whose sum is σ = 20185037700. Its totient is φ = 20185037698.

The previous prime is 20185037687. The next prime is 20185037701. The reversal of 20185037699 is 99673058102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20185037699 - 2²⁸ = 19916602243 is a prime.

Together with 20185037701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20185037629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10092518849 + 10092518850.

It is an arithmetic number, because the mean of its divisors is an integer number (10092518850).

Almost surely, 2^20185037699 is an apocalyptic number.

20185037699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20185037699 is an equidigital number, since it uses as much as digits as its factorization.

20185037699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

It can be divided in two parts, 2018503 and 7699, that added together give a palindrome (2026202).

The spelling of 20185037699 in words is "twenty billion, one hundred eighty-five million, thirty-seven thousand, six hundred ninety-nine".