18743964133 has 8 divisors (see below), whose sum is σ = 18880097400. Its totient is φ = 18607968960.

The previous prime is 18743964131. The next prime is 18743964143. The reversal of 18743964133 is 33146934781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 18740788609 = 1782^2 + 136897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18743964133 - 2¹ = 18743964131 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 (18743964131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246163 + ... + 313183.

It is an arithmetic number, because the mean of its divisors is an integer number (2360012175).

Almost surely, 2^18743964133 is an apocalyptic number.

It is an amenable number.

18743964133 is a deficient number, since it is larger than the sum of its proper divisors (136133267).

18743964133 is a wasteful number, since it uses less digits than its factorization.

18743964133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69047.

The product of its digits is 1306368, while the sum is 49.

The spelling of 18743964133 in words is "eighteen billion, seven hundred forty-three million, nine hundred sixty-four thousand, one hundred thirty-three".