172814191020 has 36 divisors (see below), whose sum is σ = 524203046640. Its totient is φ = 46083784224.

The previous prime is 172814191019. The next prime is 172814191027. The reversal of 172814191020 is 20191418271.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (172814191027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480039240 + ... + 480039599.

It is an arithmetic number, because the mean of its divisors is an integer number (14561195740).

Almost surely, 2^172814191020 is an apocalyptic number.

172814191020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172814191020 is an abundant number, since it is smaller than the sum of its proper divisors (351388855620).

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

172814191020 is a wasteful number, since it uses less digits than its factorization.

172814191020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960078854 (or 960078849 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 172814191020 in words is "one hundred seventy-two billion, eight hundred fourteen million, one hundred ninety-one thousand, twenty".