20355768 has 48 divisors (see below), whose sum is σ = 55387800. Its totient is φ = 6753600.

The previous prime is 20355757. The next prime is 20355773. The reversal of 20355768 is 86755302.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 18843 + ... + 19893.

Almost surely, 2^20355768 is an apocalyptic number.

It is an amenable number.

20355768 is an abundant number, since it is smaller than the sum of its proper divisors (35032032).

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

20355768 is a wasteful number, since it uses less digits than its factorization.

20355768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 20355768 is about 4511.7366944448. The cubic root of 20355768 is about 273.0418162408.

The spelling of 20355768 in words is "twenty million, three hundred fifty-five thousand, seven hundred sixty-eight".