20244651 has 16 divisors (see below), whose sum is σ = 30912000. Its totient is φ = 11544768.

The previous prime is 20244647. The next prime is 20244667. The reversal of 20244651 is 15644202.

It is not a de Polignac number, because 20244651 - 2² = 20244647 is a prime.

It is a super-2 number, since 2×20244651² = 819691788223602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20244641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18775 + ... + 19823.

It is an arithmetic number, because the mean of its divisors is an integer number (1932000).

Almost surely, 2^20244651 is an apocalyptic number.

20244651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20244651 is a deficient number, since it is larger than the sum of its proper divisors (10667349).

20244651 is a wasteful number, since it uses less digits than its factorization.

20244651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20244651 is about 4499.4056274135. The cubic root of 20244651 is about 272.5440873594.

Adding to 20244651 its reverse (15644202), we get a palindrome (35888853).

The spelling of 20244651 in words is "twenty million, two hundred forty-four thousand, six hundred fifty-one".