16205507020 has 24 divisors (see below), whose sum is σ = 34096906368. Its totient is φ = 6469756800.

The previous prime is 16205507009. The next prime is 16205507027. The reversal of 16205507020 is 2070550261.

It is a self number, because there is not a number n which added to its sum of digits gives 16205507020.

It is not an unprimeable number, because it can be changed into a prime (16205507027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767196 + ... + 788035.

It is an arithmetic number, because the mean of its divisors is an integer number (1420704432).

Almost surely, 2^16205507020 is an apocalyptic number.

16205507020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16205507020 is an abundant number, since it is smaller than the sum of its proper divisors (17891399348).

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

16205507020 is a wasteful number, since it uses less digits than its factorization.

16205507020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555761 (or 1555759 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 16205507020 in words is "sixteen billion, two hundred five million, five hundred seven thousand, twenty".