19699742 has 16 divisors (see below), whose sum is σ = 30279312. Its totient is φ = 9609600.

The previous prime is 19699739. The next prime is 19699763. The reversal of 19699742 is 24799691.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 14492 + ... + 15792.

It is an arithmetic number, because the mean of its divisors is an integer number (1892457).

Almost surely, 2^19699742 is an apocalyptic number.

19699742 is a deficient number, since it is larger than the sum of its proper divisors (10579570).

19699742 is a wasteful number, since it uses less digits than its factorization.

19699742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483.

The product of its digits is 244944, while the sum is 47.

The square root of 19699742 is about 4438.4391400581. The cubic root of 19699742 is about 270.0765306604.

It can be divided in two parts, 1969 and 9742, that added together give a palindrome (11711).

The spelling of 19699742 in words is "nineteen million, six hundred ninety-nine thousand, seven hundred forty-two".