20390883828 has 48 divisors (see below), whose sum is σ = 57237573120. Its totient is φ = 5519336544.

The previous prime is 20390883803. The next prime is 20390883833. The reversal of 20390883828 is 82838809302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6386526 + ... + 6389717.

It is an arithmetic number, because the mean of its divisors is an integer number (1192449440).

Almost surely, 2^20390883828 is an apocalyptic number.

20390883828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20390883828 is an abundant number, since it is smaller than the sum of its proper divisors (36846689292).

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

20390883828 is a wasteful number, since it uses less digits than its factorization.

20390883828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776276 (or 12776274 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 20390883828 in words is "twenty billion, three hundred ninety million, eight hundred eighty-three thousand, eight hundred twenty-eight".