19941406 has 4 divisors (see below), whose sum is σ = 29912112. Its totient is φ = 9970702.

The previous prime is 19941403. The next prime is 19941407. The reversal of 19941406 is 60414991.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19941403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4985350 + ... + 4985353.

It is an arithmetic number, because the mean of its divisors is an integer number (7478028).

Almost surely, 2^19941406 is an apocalyptic number.

19941406 is a deficient number, since it is larger than the sum of its proper divisors (9970706).

19941406 is an equidigital number, since it uses as much as digits as its factorization.

19941406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9970705.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19941406 is about 4465.5801414822. The cubic root of 19941406 is about 271.1764213917.

The spelling of 19941406 in words is "nineteen million, nine hundred forty-one thousand, four hundred six".