172000020 has 24 divisors (see below), whose sum is σ = 481600224. Its totient is φ = 45866656.

The previous prime is 172000019. The next prime is 172000021. The reversal of 172000020 is 20000271.

It is an interprime number because it is at equal distance from previous prime (172000019) and next prime (172000021).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172000021) 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, 1433274 + ... + 1433393.

It is an arithmetic number, because the mean of its divisors is an integer number (20066676).

Almost surely, 2^172000020 is an apocalyptic number.

172000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172000020 is an abundant number, since it is smaller than the sum of its proper divisors (309600204).

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

172000020 is a wasteful number, since it uses less digits than its factorization.

172000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866679 (or 2866677 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 172000020 is about 13114.8778110968. The cubic root of 172000020 is about 556.1297982075.

Adding to 172000020 its reverse (20000271), we get a palindrome (192000291).

The spelling of 172000020 in words is "one hundred seventy-two million, twenty", and thus it is an aban number.