20727620 has 24 divisors (see below), whose sum is σ = 44127384. Its totient is φ = 8176896.

The previous prime is 20727601. The next prime is 20727643. The reversal of 20727620 is 2672702.

It can be written as a sum of positive squares in 4 ways, for example, as 8561476 + 12166144 = 2926^2 + 3488^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20727620.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5639 + ... + 8558.

It is an arithmetic number, because the mean of its divisors is an integer number (1838641).

Almost surely, 2^20727620 is an apocalyptic number.

20727620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20727620 is an abundant number, since it is smaller than the sum of its proper divisors (23399764).

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

20727620 is a wasteful number, since it uses less digits than its factorization.

20727620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14279 (or 14277 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20727620 is about 4552.7596027025. The cubic root of 20727620 is about 274.6944043321.

The spelling of 20727620 in words is "twenty million, seven hundred twenty-seven thousand, six hundred twenty".