20363728 has 40 divisors (see below), whose sum is σ = 49193280. Its totient is φ = 7933440.

The previous prime is 20363719. The next prime is 20363731. The reversal of 20363728 is 82736302.

It is a super-3 number, since 3×20363728³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20363728.

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 7 ways as a sum of consecutive naturals, for example, 7033 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (1229832).

Almost surely, 2^20363728 is an apocalyptic number.

20363728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20363728 is an abundant number, since it is smaller than the sum of its proper divisors (28829552).

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

20363728 is a wasteful number, since it uses less digits than its factorization.

20363728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16555 (or 16549 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20363728 is about 4512.6187519001. The cubic root of 20363728 is about 273.0774020531.

The spelling of 20363728 in words is "twenty million, three hundred sixty-three thousand, seven hundred twenty-eight".