19003942 has 4 divisors (see below), whose sum is σ = 28505916. Its totient is φ = 9501970.

The previous prime is 19003939. The next prime is 19003969. The reversal of 19003942 is 24930091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×19003942² = 722299623078728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19003942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4750984 + ... + 4750987.

It is an arithmetic number, because the mean of its divisors is an integer number (7126479).

Almost surely, 2^19003942 is an apocalyptic number.

19003942 is a deficient number, since it is larger than the sum of its proper divisors (9501974).

19003942 is an equidigital number, since it uses as much as digits as its factorization.

19003942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9501973.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19003942 is about 4359.3510985008. The cubic root of 19003942 is about 266.8586177001.

The spelling of 19003942 in words is "nineteen million, three thousand, nine hundred forty-two".