20761828 has 24 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 9734784.

The previous prime is 20761823. The next prime is 20761841. The reversal of 20761828 is 82816702.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 20761793 and 20761802.

It is not an unprimeable number, because it can be changed into a prime (20761823) by changing a digit.

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, 33901 + ... + 34507.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^20761828 is an apocalyptic number.

It is an amenable number.

20761828 is a deficient number, since it is larger than the sum of its proper divisors (17848604).

20761828 is a wasteful number, since it uses less digits than its factorization.

20761828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 20761828 is about 4556.5148962776. The cubic root of 20761828 is about 274.8454360085.

The spelling of 20761828 in words is "twenty million, seven hundred sixty-one thousand, eight hundred twenty-eight".