18940709582 has 8 divisors (see below), whose sum is σ = 28495371216. Its totient is φ = 9442252512.

The previous prime is 18940709521. The next prime is 18940709591. The reversal of 18940709582 is 28590704981.

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

It is a super-2 number, since 2×18940709582² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 14050298 + ... + 14051645.

It is an arithmetic number, because the mean of its divisors is an integer number (3561921402).

Almost surely, 2^18940709582 is an apocalyptic number.

18940709582 is a deficient number, since it is larger than the sum of its proper divisors (9554661634).

18940709582 is a wasteful number, since it uses less digits than its factorization.

18940709582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28102282.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 18940709582 in words is "eighteen billion, nine hundred forty million, seven hundred nine thousand, five hundred eighty-two".