20966446 has 4 divisors (see below), whose sum is σ = 31449672. Its totient is φ = 10483222.

The previous prime is 20966431. The next prime is 20966459. The reversal of 20966446 is 64466902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64466902 = 2 ⋅32233451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5241610 + ... + 5241613.

It is an arithmetic number, because the mean of its divisors is an integer number (7862418).

Almost surely, 2^20966446 is an apocalyptic number.

20966446 is a deficient number, since it is larger than the sum of its proper divisors (10483226).

20966446 is a wasteful number, since it uses less digits than its factorization.

20966446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10483225.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 20966446 is about 4578.9131898301. The cubic root of 20966446 is about 275.7453981297.

It can be divided in two parts, 20966 and 446, that added together give a palindrome (21412).

The spelling of 20966446 in words is "twenty million, nine hundred sixty-six thousand, four hundred forty-six".