20798660 has 24 divisors (see below), whose sum is σ = 44089920. Its totient is φ = 8240864.

The previous prime is 20798653. The next prime is 20798671. The reversal of 20798660 is 6689702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720 + ... + 6999.

It is an arithmetic number, because the mean of its divisors is an integer number (1837080).

Almost surely, 2^20798660 is an apocalyptic number.

20798660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20798660 is an abundant number, since it is smaller than the sum of its proper divisors (23291260).

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

20798660 is a wasteful number, since it uses less digits than its factorization.

20798660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835 (or 9833 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 20798660 is about 4560.5547908122. The cubic root of 20798660 is about 275.0078675435.

The spelling of 20798660 in words is "twenty million, seven hundred ninety-eight thousand, six hundred sixty".