18009821662046 has 48 divisors (see below), whose sum is σ = 31249341010800. Its totient is φ = 7752279241728.

The previous prime is 18009821662003. The next prime is 18009821662067. The reversal of 18009821662046 is 64026612890081.

It is a super-2 number, since 2×18009821662046² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27956351 + ... + 28593306.

It is an arithmetic number, because the mean of its divisors is an integer number (651027937725).

Almost surely, 2^{18009821662046} is an apocalyptic number.

18009821662046 is a deficient number, since it is larger than the sum of its proper divisors (13239519348754).

18009821662046 is a wasteful number, since it uses less digits than its factorization.

18009821662046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56549741 (or 56549724 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 18009821662046 in words is "eighteen trillion, nine billion, eight hundred twenty-one million, six hundred sixty-two thousand, forty-six".