16520120 has 32 divisors (see below), whose sum is σ = 39128400. Its totient is φ = 6259968.

The previous prime is 16520099. The next prime is 16520137. The reversal of 16520120 is 2102561.

It is a congruent number.

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, 10109 + ... + 11628.

Almost surely, 2^16520120 is an apocalyptic number.

16520120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16520120 is an abundant number, since it is smaller than the sum of its proper divisors (22608280).

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

16520120 is a wasteful number, since it uses less digits than its factorization.

16520120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21767 (or 21763 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 16520120 is about 4064.4950485884. The cubic root of 16520120 is about 254.6856051021.

Adding to 16520120 its reverse (2102561), we get a palindrome (18622681).

The spelling of 16520120 in words is "sixteen million, five hundred twenty thousand, one hundred twenty".