16712017920 has 864 divisors, whose sum is σ = 66635314200. Its totient is φ = 3864526848.

The previous prime is 16712017867. The next prime is 16712017979. The reversal of 16712017920 is 2971021761.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 483296256 + 16228721664 = 21984^2 + 127392^2 .

It is a super-2 number, since 2×16712017920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 451676142 + ... + 451676178.

Almost surely, 2^16712017920 is an apocalyptic number.

16712017920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16712017920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33317657100).

16712017920 is an abundant number, since it is smaller than the sum of its proper divisors (49923296280).

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

16712017920 is a wasteful number, since it uses less digits than its factorization.

16712017920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 16712017920 in words is "sixteen billion, seven hundred twelve million, seventeen thousand, nine hundred twenty".