19540942 has 4 divisors (see below), whose sum is σ = 29311416. Its totient is φ = 9770470.

The previous prime is 19540933. The next prime is 19540951. The reversal of 19540942 is 24904591.

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

It is an interprime number because it is at equal distance from previous prime (19540933) and next prime (19540951).

It is a junction number, because it is equal to n+sod(n) for n = 19540898 and 19540907.

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 as a sum of consecutive naturals, namely, 4885234 + ... + 4885237.

It is an arithmetic number, because the mean of its divisors is an integer number (7327854).

Almost surely, 2^19540942 is an apocalyptic number.

19540942 is a deficient number, since it is larger than the sum of its proper divisors (9770474).

19540942 is an equidigital number, since it uses as much as digits as its factorization.

19540942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770473.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 19540942 is about 4420.5137710452. The cubic root of 19540942 is about 269.3488745539.

The spelling of 19540942 in words is "nineteen million, five hundred forty thousand, nine hundred forty-two".