20376820 has 24 divisors (see below), whose sum is σ = 42877800. Its totient is φ = 8134272.

The previous prime is 20376779. The next prime is 20376841. The reversal of 20376820 is 2867302.

It can be written as a sum of positive squares in 4 ways, for example, as 8363664 + 12013156 = 2892^2 + 3466^2 .

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, 15966 + ... + 17194.

It is an arithmetic number, because the mean of its divisors is an integer number (1786575).

Almost surely, 2^20376820 is an apocalyptic number.

20376820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20376820 is an abundant number, since it is smaller than the sum of its proper divisors (22500980).

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

20376820 is a wasteful number, since it uses less digits than its factorization.

20376820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20376820 is about 4514.0691177695. The cubic root of 20376820 is about 273.1359107155.

The spelling of 20376820 in words is "twenty million, three hundred seventy-six thousand, eight hundred twenty".