18973743 has 12 divisors (see below), whose sum is σ = 26226840. Its totient is φ = 12186832.

The previous prime is 18973741. The next prime is 18973763. The reversal of 18973743 is 34737981.

It is not a de Polignac number, because 18973743 - 2¹ = 18973741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18973695 and 18973704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40396 + ... + 40862.

It is an arithmetic number, because the mean of its divisors is an integer number (2185570).

Almost surely, 2^18973743 is an apocalyptic number.

18973743 is a deficient number, since it is larger than the sum of its proper divisors (7253097).

18973743 is an frugal number, since it uses more digits than its factorization.

18973743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 499 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 18973743 is about 4355.8860177925. The cubic root of 18973743 is about 266.7171885180.

The spelling of 18973743 in words is "eighteen million, nine hundred seventy-three thousand, seven hundred forty-three".