19613942 has 4 divisors (see below), whose sum is σ = 29420916. Its totient is φ = 9806970.

The previous prime is 19613941. The next prime is 19613987. The reversal of 19613942 is 24931691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24931691 = 241 ⋅103451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19613941) 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 as a sum of consecutive naturals, namely, 4903484 + ... + 4903487.

It is an arithmetic number, because the mean of its divisors is an integer number (7355229).

Almost surely, 2^19613942 is an apocalyptic number.

19613942 is a deficient number, since it is larger than the sum of its proper divisors (9806974).

19613942 is an equidigital number, since it uses as much as digits as its factorization.

19613942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9806973.

The product of its digits is 11664, while the sum is 35.

The square root of 19613942 is about 4428.7630327214. The cubic root of 19613942 is about 269.6838640999.

The spelling of 19613942 in words is "nineteen million, six hundred thirteen thousand, nine hundred forty-two".