2172002172020 has 48 divisors (see below), whose sum is σ = 4623672291840. Its totient is φ = 856924783104.

The previous prime is 2172002171959. The next prime is 2172002172049. The reversal of 2172002172020 is 202712002712.

It is a super-4 number, since 4×2172002172020⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840137 + ... + 2247183.

It is an arithmetic number, because the mean of its divisors is an integer number (96326506080).

Almost surely, 2^{2172002172020} is an apocalyptic number.

2172002172020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172002172020 is an abundant number, since it is smaller than the sum of its proper divisors (2451670119820).

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

2172002172020 is a wasteful number, since it uses less digits than its factorization.

2172002172020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408112 (or 1408110 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

Adding to 2172002172020 its reverse (202712002712), we get a palindrome (2374714174732).

The spelling of 2172002172020 in words is "two trillion, one hundred seventy-two billion, two million, one hundred seventy-two thousand, twenty".