18953806546 has 8 divisors (see below), whose sum is σ = 28481754060. Its totient is φ = 9459888528.

The previous prime is 18953806511. The next prime is 18953806567. The reversal of 18953806546 is 64560835981.

It can be written as a sum of positive squares in 2 ways, for example, as 12491415225 + 6462391321 = 111765^2 + 80389^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8505981 + ... + 8508208.

Almost surely, 2^18953806546 is an apocalyptic number.

18953806546 is a deficient number, since it is larger than the sum of its proper divisors (9527947514).

18953806546 is a wasteful number, since it uses less digits than its factorization.

18953806546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17014748.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 18953806546 in words is "eighteen billion, nine hundred fifty-three million, eight hundred six thousand, five hundred forty-six".