20395994 has 4 divisors (see below), whose sum is σ = 30593994. Its totient is φ = 10197996.

The previous prime is 20395993. The next prime is 20395997. The reversal of 20395994 is 49959302.

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., 20205025 + 190969 = 4495^2 + 437^2 .

It is not an unprimeable number, because it can be changed into a prime (20395993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5098997 + ... + 5099000.

Almost surely, 2^20395994 is an apocalyptic number.

20395994 is a deficient number, since it is larger than the sum of its proper divisors (10198000).

20395994 is a wasteful number, since it uses less digits than its factorization.

20395994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197999.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 20395994 is about 4516.1924228270. The cubic root of 20395994 is about 273.2215548634.

The spelling of 20395994 in words is "twenty million, three hundred ninety-five thousand, nine hundred ninety-four".