16520620 has 24 divisors (see below), whose sum is σ = 34779024. Its totient is φ = 6591936.

The previous prime is 16520597. The next prime is 16520627. The reversal of 16520620 is 2602561.

It is a junction number, because it is equal to n+sod(n) for n = 16520591 and 16520600.

It is not an unprimeable number, because it can be changed into a prime (16520627) by changing a digit.

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, 10399 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (1449126).

Almost surely, 2^16520620 is an apocalyptic number.

16520620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16520620 is an abundant number, since it is smaller than the sum of its proper divisors (18258404).

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

16520620 is a wasteful number, since it uses less digits than its factorization.

16520620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049 (or 2047 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16520620 is about 4064.5565563786. The cubic root of 16520620 is about 254.6881745249.

The spelling of 16520620 in words is "sixteen million, five hundred twenty thousand, six hundred twenty".