19402742 has 8 divisors (see below), whose sum is σ = 29210016. Its totient is φ = 9666072.

The previous prime is 19402741. The next prime is 19402771. The reversal of 19402742 is 24720491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19402741) 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 3 ways as a sum of consecutive naturals, for example, 16958 + ... + 18065.

It is an arithmetic number, because the mean of its divisors is an integer number (3651252).

Almost surely, 2^19402742 is an apocalyptic number.

19402742 is a deficient number, since it is larger than the sum of its proper divisors (9807274).

19402742 is a wasteful number, since it uses less digits than its factorization.

19402742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35302.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 19402742 is about 4404.8543676267. The cubic root of 19402742 is about 268.7123969743.

The spelling of 19402742 in words is "nineteen million, four hundred two thousand, seven hundred forty-two".