20703172 has 12 divisors (see below), whose sum is σ = 41406400. Its totient is φ = 8872776.

The previous prime is 20703143. The next prime is 20703191. The reversal of 20703172 is 27130702.

20703172 is an admirable number.

It is a super-3 number, since 3×20703172³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369672 + ... + 369727.

Almost surely, 2^20703172 is an apocalyptic number.

It is an amenable number.

20703172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20703172 is a wasteful number, since it uses less digits than its factorization.

20703172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739410 (or 739408 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 20703172 is about 4550.0738455546. The cubic root of 20703172 is about 274.5863621658.

Adding to 20703172 its reverse (27130702), we get a palindrome (47833874).

The spelling of 20703172 in words is "twenty million, seven hundred three thousand, one hundred seventy-two".