20446994 has 4 divisors (see below), whose sum is σ = 30670494. Its totient is φ = 10223496.

The previous prime is 20446969. The next prime is 20447003. The reversal of 20446994 is 49964402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49964402 = 2 ⋅24982201.

It can be written as a sum of positive squares in only one way, i.e., 15880225 + 4566769 = 3985^2 + 2137^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111747 + ... + 5111750.

Almost surely, 2^20446994 is an apocalyptic number.

20446994 is a deficient number, since it is larger than the sum of its proper divisors (10223500).

20446994 is a wasteful number, since it uses less digits than its factorization.

20446994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10223499.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 20446994 is about 4521.8352468881. The cubic root of 20446994 is about 273.4490946637.

The spelling of 20446994 in words is "twenty million, four hundred forty-six thousand, nine hundred ninety-four".