19900412 has 24 divisors (see below), whose sum is σ = 40285056. Its totient is φ = 8425008.

The previous prime is 19900403. The next prime is 19900417. The reversal of 19900412 is 21400991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19900417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1958 + ... + 6605.

It is an arithmetic number, because the mean of its divisors is an integer number (1678544).

Almost surely, 2^19900412 is an apocalyptic number.

It is an amenable number.

19900412 is an abundant number, since it is smaller than the sum of its proper divisors (20384644).

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

19900412 is a wasteful number, since it uses less digits than its factorization.

19900412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8657 (or 8655 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 19900412 is about 4460.9877829916. The cubic root of 19900412 is about 270.9904727432.

The spelling of 19900412 in words is "nineteen million, nine hundred thousand, four hundred twelve".