18973446 has 16 divisors (see below), whose sum is σ = 37991424. Its totient is φ = 6317064.

The previous prime is 18973441. The next prime is 18973469. The reversal of 18973446 is 64437981.

It is a super-2 number, since 2×18973446² = 719983306229832, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18973398 and 18973407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6771 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (2374464).

Almost surely, 2^18973446 is an apocalyptic number.

18973446 is an abundant number, since it is smaller than the sum of its proper divisors (19017978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18973446 is a wasteful number, since it uses less digits than its factorization.

18973446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715.

The product of its digits is 145152, while the sum is 42.

The square root of 18973446 is about 4355.8519258579. The cubic root of 18973446 is about 266.7157968506.

The spelling of 18973446 in words is "eighteen million, nine hundred seventy-three thousand, four hundred forty-six".