20778300 has 54 divisors (see below), whose sum is σ = 65131248. Its totient is φ = 5540640.

The previous prime is 20778299. The next prime is 20778311. The reversal of 20778300 is 387702.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 10644 + ... + 12443.

Almost surely, 2^20778300 is an apocalyptic number.

20778300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20778300 is an abundant number, since it is smaller than the sum of its proper divisors (44352948).

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

20778300 is a wasteful number, since it uses less digits than its factorization.

20778300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23107 (or 23097 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20778300 is about 4558.3220597057. The cubic root of 20778300 is about 274.9181023343.

The spelling of 20778300 in words is "twenty million, seven hundred seventy-eight thousand, three hundred".