18936715893 has 16 divisors (see below), whose sum is σ = 26070460416. Its totient is φ = 12213943920.

The previous prime is 18936715813. The next prime is 18936715957. The reversal of 18936715893 is 39851763981.

It is not a de Polignac number, because 18936715893 - 2¹³ = 18936707701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18936715813) 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 in 15 ways as a sum of consecutive naturals, for example, 346846 + ... + 397712.

It is an arithmetic number, because the mean of its divisors is an integer number (1629403776).

Almost surely, 2^18936715893 is an apocalyptic number.

It is an amenable number.

18936715893 is a deficient number, since it is larger than the sum of its proper divisors (7133744523).

18936715893 is a wasteful number, since it uses less digits than its factorization.

18936715893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54904.

The product of its digits is 9797760, while the sum is 60.

The spelling of 18936715893 in words is "eighteen billion, nine hundred thirty-six million, seven hundred fifteen thousand, eight hundred ninety-three".