19974906 has 48 divisors (see below), whose sum is σ = 50529024. Its totient is φ = 5584032.

The previous prime is 19974901. The next prime is 19974907. The reversal of 19974906 is 60947991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19974901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4236 + ... + 7608.

It is an arithmetic number, because the mean of its divisors is an integer number (1052688).

Almost surely, 2^19974906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19974906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25264512).

19974906 is an abundant number, since it is smaller than the sum of its proper divisors (30554118).

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

19974906 is a wasteful number, since it uses less digits than its factorization.

19974906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435 (or 3432 counting only the distinct ones).

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

The square root of 19974906 is about 4469.3294799108. The cubic root of 19974906 is about 271.3281881532.

It can be divided in two parts, 1997 and 4906, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 19974906 in words is "nineteen million, nine hundred seventy-four thousand, nine hundred six".