18725396453 has 4 divisors (see below), whose sum is σ = 19826890380. Its totient is φ = 17623902528.

The previous prime is 18725396447. The next prime is 18725396461. The reversal of 18725396453 is 35469352781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35469352781 = 2267 ⋅15645943.

It can be written as a sum of positive squares in 2 ways, for example, as 7237415329 + 11487981124 = 85073^2 + 107182^2 .

It is a cyclic number.

It is not a de Polignac number, because 18725396453 - 2³² = 14430429157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18725396395 and 18725396404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18725396353) 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, 550746938 + ... + 550746971.

It is an arithmetic number, because the mean of its divisors is an integer number (4956722595).

Almost surely, 2^18725396453 is an apocalyptic number.

It is an amenable number.

18725396453 is a deficient number, since it is larger than the sum of its proper divisors (1101493927).

18725396453 is a wasteful number, since it uses less digits than its factorization.

18725396453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101493926.

The product of its digits is 5443200, while the sum is 53.

The spelling of 18725396453 in words is "eighteen billion, seven hundred twenty-five million, three hundred ninety-six thousand, four hundred fifty-three".