20516794 has 4 divisors (see below), whose sum is σ = 30775194. Its totient is φ = 10258396.

The previous prime is 20516791. The next prime is 20516803. The reversal of 20516794 is 49761502.

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., 17330569 + 3186225 = 4163^2 + 1785^2 .

It is not an unprimeable number, because it can be changed into a prime (20516791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5129197 + ... + 5129200.

Almost surely, 2^20516794 is an apocalyptic number.

20516794 is a deficient number, since it is larger than the sum of its proper divisors (10258400).

20516794 is a wasteful number, since it uses less digits than its factorization.

20516794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10258399.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20516794 is about 4529.5467764446. The cubic root of 20516794 is about 273.7598994217.

The spelling of 20516794 in words is "twenty million, five hundred sixteen thousand, seven hundred ninety-four".