19677442 has 8 divisors (see below), whose sum is σ = 29920716. Its totient is φ = 9703872.

The previous prime is 19677433. The next prime is 19677461. The reversal of 19677442 is 24477691.

It can be written as a sum of positive squares in 2 ways, for example, as 19633761 + 43681 = 4431^2 + 209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19677395 and 19677404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67243 + ... + 67534.

Almost surely, 2^19677442 is an apocalyptic number.

19677442 is a deficient number, since it is larger than the sum of its proper divisors (10243274).

19677442 is a wasteful number, since it uses less digits than its factorization.

19677442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134852.

The product of its digits is 84672, while the sum is 40.

The square root of 19677442 is about 4435.9262843289. The cubic root of 19677442 is about 269.9745837987.

It can be divided in two parts, 1967 and 7442, that added together give a square (9409 = 97²).

The spelling of 19677442 in words is "nineteen million, six hundred seventy-seven thousand, four hundred forty-two".