20266172 has 12 divisors (see below), whose sum is σ = 35614656. Its totient is φ = 10090560.

The previous prime is 20266171. The next prime is 20266199. The reversal of 20266172 is 27166202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9548 + ... + 11475.

It is an arithmetic number, because the mean of its divisors is an integer number (2967888).

Almost surely, 2^20266172 is an apocalyptic number.

It is an amenable number.

20266172 is a deficient number, since it is larger than the sum of its proper divisors (15348484).

20266172 is a wasteful number, since it uses less digits than its factorization.

20266172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21268 (or 21266 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20266172 is about 4501.7965302754. The cubic root of 20266172 is about 272.6406288133.

The spelling of 20266172 in words is "twenty million, two hundred sixty-six thousand, one hundred seventy-two".