20800451 has 12 divisors (see below), whose sum is σ = 24596640. Its totient is φ = 17534160.

The previous prime is 20800427. The next prime is 20800471. The reversal of 20800451 is 15400802.

It is not a de Polignac number, because 20800451 - 2¹⁸ = 20538307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20800471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 491 + ... + 6468.

It is an arithmetic number, because the mean of its divisors is an integer number (2049720).

Almost surely, 2^20800451 is an apocalyptic number.

20800451 is a deficient number, since it is larger than the sum of its proper divisors (3796189).

20800451 is an equidigital number, since it uses as much as digits as its factorization.

20800451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034 (or 7027 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20800451 is about 4560.7511442744. The cubic root of 20800451 is about 275.0157610801.

The spelling of 20800451 in words is "twenty million, eight hundred thousand, four hundred fifty-one".