19313642 has 4 divisors (see below), whose sum is σ = 28970466. Its totient is φ = 9656820.

The previous prime is 19313641. The next prime is 19313687. The reversal of 19313642 is 24631391.

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

It can be written as a sum of positive squares in only one way, i.e., 19280881 + 32761 = 4391^2 + 181^2 .

It is not an unprimeable number, because it can be changed into a prime (19313641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828409 + ... + 4828412.

Almost surely, 2^19313642 is an apocalyptic number.

19313642 is a deficient number, since it is larger than the sum of its proper divisors (9656824).

19313642 is an equidigital number, since it uses as much as digits as its factorization.

19313642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9656823.

The product of its digits is 3888, while the sum is 29.

The square root of 19313642 is about 4394.7288881113. The cubic root of 19313642 is about 268.3004445972.

The spelling of 19313642 in words is "nineteen million, three hundred thirteen thousand, six hundred forty-two".