19420142 has 32 divisors (see below), whose sum is σ = 35610624. Its totient is φ = 7761600.

The previous prime is 19420139. The next prime is 19420189. The reversal of 19420142 is 24102491.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

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, 12467 + ... + 13937.

It is an arithmetic number, because the mean of its divisors is an integer number (1112832).

Almost surely, 2^19420142 is an apocalyptic number.

19420142 is a deficient number, since it is larger than the sum of its proper divisors (16190482).

19420142 is a wasteful number, since it uses less digits than its factorization.

19420142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 19420142 is about 4406.8290186936. The cubic root of 19420142 is about 268.7926983177.

The spelling of 19420142 in words is "nineteen million, four hundred twenty thousand, one hundred forty-two".