18973391053 has 8 divisors (see below), whose sum is σ = 19216154880. Its totient is φ = 18730692240.

The previous prime is 18973391029. The next prime is 18973391077. The reversal of 18973391053 is 35019337981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18973391029) and next prime (18973391077).

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 18973391053 - 2¹³ = 18973382861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18973390988 and 18973391006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973391153) 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, 893823 + ... + 914803.

It is an arithmetic number, because the mean of its divisors is an integer number (2402019360).

Almost surely, 2^18973391053 is an apocalyptic number.

It is an amenable number.

18973391053 is a deficient number, since it is larger than the sum of its proper divisors (242763827).

18973391053 is a wasteful number, since it uses less digits than its factorization.

18973391053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32507.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 18973391053 in words is "eighteen billion, nine hundred seventy-three million, three hundred ninety-one thousand, fifty-three".