18936322061 has 4 divisors (see below), whose sum is σ = 19120169952. Its totient is φ = 18752474172.

The previous prime is 18936321997. The next prime is 18936322099. The reversal of 18936322061 is 16022363981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18936322061 - 2⁶ = 18936321997 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 (18936322261) 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, 91923791 + ... + 91923996.

It is an arithmetic number, because the mean of its divisors is an integer number (4780042488).

Almost surely, 2^18936322061 is an apocalyptic number.

It is an amenable number.

18936322061 is a deficient number, since it is larger than the sum of its proper divisors (183847891).

18936322061 is a wasteful number, since it uses less digits than its factorization.

18936322061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183847890.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 18936322061 in words is "eighteen billion, nine hundred thirty-six million, three hundred twenty-two thousand, sixty-one".