19973946 has 24 divisors (see below), whose sum is σ = 42439680. Its totient is φ = 6265792.

The previous prime is 19973939. The next prime is 19973971. The reversal of 19973946 is 64937991.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19973895 and 19973904.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4026 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (1768320).

Almost surely, 2^19973946 is an apocalyptic number.

19973946 is an abundant number, since it is smaller than the sum of its proper divisors (22465734).

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

19973946 is a wasteful number, since it uses less digits than its factorization.

19973946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11558 (or 11541 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The square root of 19973946 is about 4469.2220799598. Note that the first 3 decimals coincide. The cubic root of 19973946 is about 271.3238413788.

The spelling of 19973946 in words is "nineteen million, nine hundred seventy-three thousand, nine hundred forty-six".