19908694 has 32 divisors (see below), whose sum is σ = 34191360. Its totient is φ = 8618400.

The previous prime is 19908689. The next prime is 19908697. The reversal of 19908694 is 49680991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19908697) 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 15 ways as a sum of consecutive naturals, for example, 94249 + ... + 94459.

It is an arithmetic number, because the mean of its divisors is an integer number (1068480).

Almost surely, 2^19908694 is an apocalyptic number.

19908694 is a deficient number, since it is larger than the sum of its proper divisors (14282666).

19908694 is a wasteful number, since it uses less digits than its factorization.

19908694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 19908694 is about 4461.9159561785. The cubic root of 19908694 is about 271.0280604378.

It can be divided in two parts, 19908 and 694, that added together give a palindrome (20602).

The spelling of 19908694 in words is "nineteen million, nine hundred eight thousand, six hundred ninety-four".