18705631954 has 8 divisors (see below), whose sum is σ = 28066160880. Its totient is φ = 9350244996.

The previous prime is 18705631951. The next prime is 18705631961. The reversal of 18705631954 is 45913650781.

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

It is a junction number, because it is equal to n+sod(n) for n = 18705631898 and 18705631907.

It is not an unprimeable number, because it can be changed into a prime (18705631951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276384 + ... + 1290955.

It is an arithmetic number, because the mean of its divisors is an integer number (3508270110).

Almost surely, 2^18705631954 is an apocalyptic number.

18705631954 is a deficient number, since it is larger than the sum of its proper divisors (9360528926).

18705631954 is a wasteful number, since it uses less digits than its factorization.

18705631954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570984.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 18705631954 in words is "eighteen billion, seven hundred five million, six hundred thirty-one thousand, nine hundred fifty-four".