16742986 has 8 divisors (see below), whose sum is σ = 27046404. Its totient is φ = 7727520.

The previous prime is 16742983. The next prime is 16742987. The reversal of 16742986 is 68924761.

It can be written as a sum of positive squares in 2 ways, for example, as 15752961 + 990025 = 3969^2 + 995^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16742983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321955 + ... + 322006.

Almost surely, 2^16742986 is an apocalyptic number.

16742986 is a deficient number, since it is larger than the sum of its proper divisors (10303418).

16742986 is a wasteful number, since it uses less digits than its factorization.

16742986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643976.

The product of its digits is 145152, while the sum is 43.

The square root of 16742986 is about 4091.8193997292. The cubic root of 16742986 is about 255.8257786770.

The spelling of 16742986 in words is "sixteen million, seven hundred forty-two thousand, nine hundred eighty-six".