20800854 has 32 divisors (see below), whose sum is σ = 46548480. Its totient is φ = 6885000.

The previous prime is 20800853. The next prime is 20800861. The reversal of 20800854 is 45800802.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6879 + ... + 9429.

It is an arithmetic number, because the mean of its divisors is an integer number (1454640).

Almost surely, 2^20800854 is an apocalyptic number.

20800854 is an abundant number, since it is smaller than the sum of its proper divisors (25747626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20800854 is a wasteful number, since it uses less digits than its factorization.

20800854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2707 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20800854 is about 4560.7953253791. The cubic root of 20800854 is about 275.0175371736.

The spelling of 20800854 in words is "twenty million, eight hundred thousand, eight hundred fifty-four".