20213794 has 4 divisors (see below), whose sum is σ = 30320694. Its totient is φ = 10106896.

The previous prime is 20213761. The next prime is 20213819. The reversal of 20213794 is 49731202.

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., 18809569 + 1404225 = 4337^2 + 1185^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053447 + ... + 5053450.

Almost surely, 2^20213794 is an apocalyptic number.

20213794 is a deficient number, since it is larger than the sum of its proper divisors (10106900).

20213794 is a wasteful number, since it uses less digits than its factorization.

20213794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106899.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20213794 is about 4495.9753113201. The cubic root of 20213794 is about 272.4055459191.

Adding to 20213794 its reverse (49731202), we get a palindrome (69944996).

The spelling of 20213794 in words is "twenty million, two hundred thirteen thousand, seven hundred ninety-four".