19678412 has 24 divisors (see below), whose sum is σ = 37274496. Its totient is φ = 9036288.

The previous prime is 19678411. The next prime is 19678429. The reversal of 19678412 is 21487691.

19678412 = 179² + 180² + ... + 401².

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19678411) 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, 10748 + ... + 12444.

It is an arithmetic number, because the mean of its divisors is an integer number (1553104).

Almost surely, 2^19678412 is an apocalyptic number.

It is an amenable number.

19678412 is a deficient number, since it is larger than the sum of its proper divisors (17596084).

19678412 is a wasteful number, since it uses less digits than its factorization.

19678412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937 (or 1935 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 19678412 is about 4436.0356175306. The cubic root of 19678412 is about 269.9790198604.

The spelling of 19678412 in words is "nineteen million, six hundred seventy-eight thousand, four hundred twelve".