17172217020 has 48 divisors (see below), whose sum is σ = 54951095808. Its totient is φ = 3925078080.

The previous prime is 17172217009. The next prime is 17172217033. The reversal of 17172217020 is 2071227171.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20442696 + ... + 20443535.

It is an arithmetic number, because the mean of its divisors is an integer number (1144814496).

Almost surely, 2^17172217020 is an apocalyptic number.

17172217020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17172217020 is an abundant number, since it is smaller than the sum of its proper divisors (37778878788).

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

17172217020 is a wasteful number, since it uses less digits than its factorization.

17172217020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40886250 (or 40886248 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 30.

The spelling of 17172217020 in words is "seventeen billion, one hundred seventy-two million, two hundred seventeen thousand, twenty".