20755900 has 36 divisors (see below), whose sum is σ = 49137480. Its totient is φ = 7547200.

The previous prime is 20755877. The next prime is 20755937. The reversal of 20755900 is 955702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8335 + ... + 10534.

It is an arithmetic number, because the mean of its divisors is an integer number (1364930).

Almost surely, 2^20755900 is an apocalyptic number.

20755900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20755900 is an abundant number, since it is smaller than the sum of its proper divisors (28381580).

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

20755900 is a wasteful number, since it uses less digits than its factorization.

20755900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18894 (or 18887 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 20755900 is about 4555.8643526778. The cubic root of 20755900 is about 274.8192751965.

The spelling of 20755900 in words is "twenty million, seven hundred fifty-five thousand, nine hundred".