20803056 has 40 divisors (see below), whose sum is σ = 54996480. Its totient is φ = 6772416.

The previous prime is 20803021. The next prime is 20803061. The reversal of 20803056 is 65030802.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (1374912).

Almost surely, 2^20803056 is an apocalyptic number.

It is an amenable number.

20803056 is an abundant number, since it is smaller than the sum of its proper divisors (34193424).

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

20803056 is a wasteful number, since it uses less digits than its factorization.

20803056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10133 (or 10127 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20803056 is about 4561.0367242547. The cubic root of 20803056 is about 275.0272413785.

Adding to 20803056 its reverse (65030802), we get a palindrome (85833858).

The spelling of 20803056 in words is "twenty million, eight hundred three thousand, fifty-six".