20464851 has 12 divisors (see below), whose sum is σ = 29993096. Its totient is φ = 12402720.

The previous prime is 20464849. The next prime is 20464883. The reversal of 20464851 is 15846402.

It is not a de Polignac number, because 20464851 - 2¹ = 20464849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20464841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27826 + ... + 28551.

Almost surely, 2^20464851 is an apocalyptic number.

20464851 is a deficient number, since it is larger than the sum of its proper divisors (9528245).

20464851 is a wasteful number, since it uses less digits than its factorization.

20464851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56402 (or 56391 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20464851 is about 4523.8093461153. The cubic root of 20464851 is about 273.5286753865.

The spelling of 20464851 in words is "twenty million, four hundred sixty-four thousand, eight hundred fifty-one".