16920552971 has 8 divisors (see below), whose sum is σ = 19406594784. Its totient is φ = 14451716160.

The previous prime is 16920552953. The next prime is 16920553003. The reversal of 16920552971 is 17925502961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16920552971 - 2⁶ = 16920552907 is a prime.

It is a super-3 number, since 3×16920552971³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16920552871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4299140 + ... + 4303073.

It is an arithmetic number, because the mean of its divisors is an integer number (2425824348).

Almost surely, 2^16920552971 is an apocalyptic number.

16920552971 is a deficient number, since it is larger than the sum of its proper divisors (2486041813).

16920552971 is an equidigital number, since it uses as much as digits as its factorization.

16920552971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8602501.

The product of its (nonzero) digits is 340200, while the sum is 47.

The spelling of 16920552971 in words is "sixteen billion, nine hundred twenty million, five hundred fifty-two thousand, nine hundred seventy-one".