16205124820 has 24 divisors (see below), whose sum is σ = 34093688328. Its totient is φ = 6470064000.

The previous prime is 16205124799. The next prime is 16205124851. The reversal of 16205124820 is 2842150261.

It can be written as a sum of positive squares in 4 ways, for example, as 761097744 + 15444027076 = 27588^2 + 124274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738031 + ... + 759670.

It is an arithmetic number, because the mean of its divisors is an integer number (1420570347).

Almost surely, 2^16205124820 is an apocalyptic number.

16205124820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16205124820 is an abundant number, since it is smaller than the sum of its proper divisors (17888563508).

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

16205124820 is a wasteful number, since it uses less digits than its factorization.

16205124820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498251 (or 1498249 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 16205124820 in words is "sixteen billion, two hundred five million, one hundred twenty-four thousand, eight hundred twenty".