20876451 has 4 divisors (see below), whose sum is σ = 27835272. Its totient is φ = 13917632.

The previous prime is 20876441. The next prime is 20876483. The reversal of 20876451 is 15467802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20876451 - 2¹⁰ = 20875427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20876431) 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 3 ways as a sum of consecutive naturals, for example, 3479406 + ... + 3479411.

It is an arithmetic number, because the mean of its divisors is an integer number (6958818).

Almost surely, 2^20876451 is an apocalyptic number.

20876451 is a deficient number, since it is larger than the sum of its proper divisors (6958821).

20876451 is an equidigital number, since it uses as much as digits as its factorization.

20876451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6958820.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20876451 is about 4569.0755082402. The cubic root of 20876451 is about 275.3503017968.

The spelling of 20876451 in words is "twenty million, eight hundred seventy-six thousand, four hundred fifty-one".