19938946 has 16 divisors (see below), whose sum is σ = 30446208. Its totient is φ = 9792000.

The previous prime is 19938911. The next prime is 19938949. The reversal of 19938946 is 64983991.

It is a self number, because there is not a number n which added to its sum of digits gives 19938946.

It is not an unprimeable number, because it can be changed into a prime (19938949) 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, 30786 + ... + 31426.

It is an arithmetic number, because the mean of its divisors is an integer number (1902888).

Almost surely, 2^19938946 is an apocalyptic number.

19938946 is a deficient number, since it is larger than the sum of its proper divisors (10507262).

19938946 is a wasteful number, since it uses less digits than its factorization.

19938946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its digits is 419904, while the sum is 49.

The square root of 19938946 is about 4465.3046928513. The cubic root of 19938946 is about 271.1652700311.

The spelling of 19938946 in words is "nineteen million, nine hundred thirty-eight thousand, nine hundred forty-six".