18471273943684 has 27 divisors (see below), whose sum is σ = 32383667291493. Its totient is φ = 9218828190000.

The previous prime is 18471273943667. The next prime is 18471273943699. The reversal of 18471273943684 is 48634937217481.

The square root of 18471273943684 is 4297822.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14666433583684 + 3804840360000 = 3829678^2 + 1950600^2 .

It is a super-2 number, since 2×18471273943684² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5681719059 + ... + 5681722309.

Almost surely, 2^{18471273943684} is an apocalyptic number.

18471273943684 is the 4297822-nd square number.

It is an amenable number.

18471273943684 is a deficient number, since it is larger than the sum of its proper divisors (13912393347809).

18471273943684 is an frugal number, since it uses more digits than its factorization.

18471273943684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828 (or 3914 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 67.

The spelling of 18471273943684 in words is "eighteen trillion, four hundred seventy-one billion, two hundred seventy-three million, nine hundred forty-three thousand, six hundred eighty-four".