20716874 has 8 divisors (see below), whose sum is σ = 31101060. Its totient is φ = 10349856.

The previous prime is 20716873. The next prime is 20716907. The reversal of 20716874 is 47861702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17850625 + 2866249 = 4225^2 + 1693^2 .

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 (20716873) 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, 659 + ... + 6470.

Almost surely, 2^20716874 is an apocalyptic number.

20716874 is a deficient number, since it is larger than the sum of its proper divisors (10384186).

20716874 is a wasteful number, since it uses less digits than its factorization.

20716874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 20716874 is about 4551.5792863576. The cubic root of 20716874 is about 274.6469253912.

The spelling of 20716874 in words is "twenty million, seven hundred sixteen thousand, eight hundred seventy-four".