18692963983 has 4 divisors (see below), whose sum is σ = 18731989440. Its totient is φ = 18653938528.

The previous prime is 18692963981. The next prime is 18692963987. The reversal of 18692963983 is 38936929681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38936929681 = 13 ⋅2995148437.

It is a cyclic number.

It is not a de Polignac number, because 18692963983 - 2¹ = 18692963981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18692963981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19512010 + ... + 19512967.

It is an arithmetic number, because the mean of its divisors is an integer number (4682997360).

Almost surely, 2^18692963983 is an apocalyptic number.

18692963983 is a deficient number, since it is larger than the sum of its proper divisors (39025457).

18692963983 is an equidigital number, since it uses as much as digits as its factorization.

18692963983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39025456.

The product of its digits is 30233088, while the sum is 64.

The spelling of 18692963983 in words is "eighteen billion, six hundred ninety-two million, nine hundred sixty-three thousand, nine hundred eighty-three".