20755628 has 12 divisors (see below), whose sum is σ = 36377040. Its totient is φ = 10362192.

The previous prime is 20755613. The next prime is 20755649. The reversal of 20755628 is 82655702.

It is a zygodrome in base 3.

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 3 ways as a sum of consecutive naturals, for example, 608 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (3031420).

Almost surely, 2^20755628 is an apocalyptic number.

It is an amenable number.

20755628 is a deficient number, since it is larger than the sum of its proper divisors (15621412).

20755628 is a wasteful number, since it uses less digits than its factorization.

20755628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816 (or 7814 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 20755628 is about 4555.8345009449. The cubic root of 20755628 is about 274.8180747158.

The spelling of 20755628 in words is "twenty million, seven hundred fifty-five thousand, six hundred twenty-eight".