20350172 has 6 divisors (see below), whose sum is σ = 35612808. Its totient is φ = 10175084.

The previous prime is 20350171. The next prime is 20350181. The reversal of 20350172 is 27105302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2543768 + ... + 2543775.

It is an arithmetic number, because the mean of its divisors is an integer number (5935468).

Almost surely, 2^20350172 is an apocalyptic number.

It is an amenable number.

20350172 is a deficient number, since it is larger than the sum of its proper divisors (15262636).

20350172 is a wasteful number, since it uses less digits than its factorization.

20350172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087547 (or 5087545 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20350172 is about 4511.1164915129. The cubic root of 20350172 is about 273.0167933244.

Adding to 20350172 its reverse (27105302), we get a palindrome (47455474).

The spelling of 20350172 in words is "twenty million, three hundred fifty thousand, one hundred seventy-two".