18641172046 has 8 divisors (see below), whose sum is σ = 31956294960. Its totient is φ = 7989073728.

The previous prime is 18641172041. The next prime is 18641172107. The reversal of 18641172046 is 64027114681.

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

It is a super-4 number, since 4×18641172046⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18641172041) 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, 665756131 + ... + 665756158.

It is an arithmetic number, because the mean of its divisors is an integer number (3994536870).

Almost surely, 2^18641172046 is an apocalyptic number.

18641172046 is a deficient number, since it is larger than the sum of its proper divisors (13315122914).

18641172046 is a wasteful number, since it uses less digits than its factorization.

18641172046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331512298.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 18641172046 in words is "eighteen billion, six hundred forty-one million, one hundred seventy-two thousand, forty-six".