20880700 has 18 divisors (see below), whose sum is σ = 45311336. Its totient is φ = 8352240.

The previous prime is 20880697. The next prime is 20880721. The reversal of 20880700 is 708802.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104304 + ... + 104503.

Almost surely, 2^20880700 is an apocalyptic number.

20880700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20880700 is an abundant number, since it is smaller than the sum of its proper divisors (24430636).

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

20880700 is a wasteful number, since it uses less digits than its factorization.

20880700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208821 (or 208814 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 20880700 is about 4569.5404582956. The cubic root of 20880700 is about 275.3689812819.

It can be divided in two parts, 208 and 80700, that added together give a palindrome (80908).

The spelling of 20880700 in words is "twenty million, eight hundred eighty thousand, seven hundred".