20408186093 has 2 divisors, whose sum is σ = 20408186094. Its totient is φ = 20408186092.

The previous prime is 20408186059. The next prime is 20408186171. The reversal of 20408186093 is 39068180402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16073675524 + 4334510569 = 126782^2 + 65837^2 .

It is a cyclic number.

It is not a de Polignac number, because 20408186093 - 2²² = 20403991789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20408186093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20408186053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10204093046 + 10204093047.

It is an arithmetic number, because the mean of its divisors is an integer number (10204093047).

Almost surely, 2^20408186093 is an apocalyptic number.

It is an amenable number.

20408186093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20408186093 is an equidigital number, since it uses as much as digits as its factorization.

20408186093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 20408186093 in words is "twenty billion, four hundred eight million, one hundred eighty-six thousand, ninety-three".