20387832820 has 24 divisors (see below), whose sum is σ = 43330289184. Its totient is φ = 8056877856.

The previous prime is 20387832781. The next prime is 20387832847. The reversal of 20387832820 is 2823878302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6139254 + ... + 6142573.

It is an arithmetic number, because the mean of its divisors is an integer number (1805428716).

Almost surely, 2^20387832820 is an apocalyptic number.

20387832820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20387832820 is an abundant number, since it is smaller than the sum of its proper divisors (22942456364).

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

20387832820 is a wasteful number, since it uses less digits than its factorization.

20387832820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12281919 (or 12281917 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 20387832820 in words is "twenty billion, three hundred eighty-seven million, eight hundred thirty-two thousand, eight hundred twenty".