19420942 has 8 divisors (see below), whose sum is σ = 30071232. Its totient is φ = 9397200.

The previous prime is 19420939. The next prime is 19420943. The reversal of 19420942 is 24902491.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420943) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 156559 + ... + 156682.

It is an arithmetic number, because the mean of its divisors is an integer number (3758904).

Almost surely, 2^19420942 is an apocalyptic number.

19420942 is a deficient number, since it is larger than the sum of its proper divisors (10650290).

19420942 is a wasteful number, since it uses less digits than its factorization.

19420942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313274.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 19420942 is about 4406.9197859730. The cubic root of 19420942 is about 268.7963891799.

The spelling of 19420942 in words is "nineteen million, four hundred twenty thousand, nine hundred forty-two".