16171523020 has 24 divisors (see below), whose sum is σ = 35957857824. Its totient is φ = 6088102656.

The previous prime is 16171523009. The next prime is 16171523047. The reversal of 16171523020 is 2032517161.

It is a happy number.

It is a super-3 number, since 3×16171523020³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16171523020.

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, 23781312 + ... + 23781991.

It is an arithmetic number, because the mean of its divisors is an integer number (1498244076).

Almost surely, 2^16171523020 is an apocalyptic number.

16171523020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16171523020 is an abundant number, since it is smaller than the sum of its proper divisors (19786334804).

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

16171523020 is a wasteful number, since it uses less digits than its factorization.

16171523020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47563329 (or 47563327 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 16171523020 in words is "sixteen billion, one hundred seventy-one million, five hundred twenty-three thousand, twenty".