19990476 has 120 divisors (see below), whose sum is σ = 58544640. Its totient is φ = 5896800.

The previous prime is 19990459. The next prime is 19990499. The reversal of 19990476 is 67409991.

19990476 is a `hidden beast` number, since 1 + 99 + 90 + 476 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 253005 + ... + 253083.

It is an arithmetic number, because the mean of its divisors is an integer number (487872).

Almost surely, 2^19990476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19990476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29272320).

19990476 is an abundant number, since it is smaller than the sum of its proper divisors (38554164).

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

19990476 is a wasteful number, since it uses less digits than its factorization.

19990476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 19990476 is about 4471.0710126322. The cubic root of 19990476 is about 271.3986679627.

The spelling of 19990476 in words is "nineteen million, nine hundred ninety thousand, four hundred seventy-six".