17940804487 has 8 divisors (see below), whose sum is σ = 18030844656. Its totient is φ = 17850861312.

The previous prime is 17940804443. The next prime is 17940804491. The reversal of 17940804487 is 78440804971.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17940804487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17940804407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361933 + ... + 408505.

It is an arithmetic number, because the mean of its divisors is an integer number (2253855582).

Almost surely, 2^17940804487 is an apocalyptic number.

17940804487 is a deficient number, since it is larger than the sum of its proper divisors (90040169).

17940804487 is a wasteful number, since it uses less digits than its factorization.

17940804487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48497.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 17940804487 in words is "seventeen billion, nine hundred forty million, eight hundred four thousand, four hundred eighty-seven".