20739828 has 12 divisors (see below), whose sum is σ = 48392960. Its totient is φ = 6913272.

The previous prime is 20739799. The next prime is 20739839. The reversal of 20739828 is 82893702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864148 + ... + 864171.

Almost surely, 2^20739828 is an apocalyptic number.

It is an amenable number.

20739828 is an abundant number, since it is smaller than the sum of its proper divisors (27653132).

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

20739828 is a wasteful number, since it uses less digits than its factorization.

20739828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728326 (or 1728324 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20739828 is about 4554.1001306515. The cubic root of 20739828 is about 274.7483229061.

The spelling of 20739828 in words is "twenty million, seven hundred thirty-nine thousand, eight hundred twenty-eight".