172500020 has 144 divisors (see below), whose sum is σ = 482630400. Its totient is φ = 50519040.

The previous prime is 172500019. The next prime is 172500043. The reversal of 172500020 is 20005271.

172500020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287681 + ... + 288279.

It is an arithmetic number, because the mean of its divisors is an integer number (3351600).

Almost surely, 2^172500020 is an apocalyptic number.

172500020 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 172500020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241315200).

172500020 is an abundant number, since it is smaller than the sum of its proper divisors (310130380).

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

172500020 is a wasteful number, since it uses less digits than its factorization.

172500020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 172500020 is about 13133.9262979507. The cubic root of 172500020 is about 556.6681622742.

Adding to 172500020 its reverse (20005271), we get a palindrome (192505291).

The spelling of 172500020 in words is "one hundred seventy-two million, five hundred thousand, twenty".