18326933961 has 16 divisors (see below), whose sum is σ = 27930569088. Its totient is φ = 10471104000.

The previous prime is 18326933959. The next prime is 18326933983. The reversal of 18326933961 is 16933962381.

It is a happy number.

It is not a de Polignac number, because 18326933961 - 2¹ = 18326933959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18326933161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109011 + ... + 220311.

It is an arithmetic number, because the mean of its divisors is an integer number (1745660568).

Almost surely, 2^18326933961 is an apocalyptic number.

It is an amenable number.

18326933961 is a deficient number, since it is larger than the sum of its proper divisors (9603635127).

18326933961 is a wasteful number, since it uses less digits than its factorization.

18326933961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119152.

The product of its digits is 1259712, while the sum is 51.

The spelling of 18326933961 in words is "eighteen billion, three hundred twenty-six million, nine hundred thirty-three thousand, nine hundred sixty-one".