18459459451 has 4 divisors (see below), whose sum is σ = 18628812400. Its totient is φ = 18290106504.

The previous prime is 18459459427. The next prime is 18459459457. The reversal of 18459459451 is 15495495481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18459459451 - 2⁵ = 18459459419 is a prime.

It is a super-2 number, since 2×18459459451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18459459392 and 18459459401.

It is not an unprimeable number, because it can be changed into a prime (18459459457) 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, 84676311 + ... + 84676528.

It is an arithmetic number, because the mean of its divisors is an integer number (4657203100).

Almost surely, 2^18459459451 is an apocalyptic number.

18459459451 is a deficient number, since it is larger than the sum of its proper divisors (169352949).

18459459451 is a wasteful number, since it uses less digits than its factorization.

18459459451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169352948.

The product of its digits is 5184000, while the sum is 55.

The spelling of 18459459451 in words is "eighteen billion, four hundred fifty-nine million, four hundred fifty-nine thousand, four hundred fifty-one".