19742654 has 4 divisors (see below), whose sum is σ = 29613984. Its totient is φ = 9871326.

The previous prime is 19742641. The next prime is 19742663. The reversal of 19742654 is 45624791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45624791 = 79 ⋅577529.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935662 + ... + 4935665.

It is an arithmetic number, because the mean of its divisors is an integer number (7403496).

Almost surely, 2^19742654 is an apocalyptic number.

19742654 is a deficient number, since it is larger than the sum of its proper divisors (9871330).

19742654 is an equidigital number, since it uses as much as digits as its factorization.

19742654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871329.

The product of its digits is 60480, while the sum is 38.

The square root of 19742654 is about 4443.2706422184. The cubic root of 19742654 is about 270.2724912486.

The spelling of 19742654 in words is "nineteen million, seven hundred forty-two thousand, six hundred fifty-four".