20385272 has 16 divisors (see below), whose sum is σ = 38653200. Its totient is φ = 10077760.

The previous prime is 20385257. The next prime is 20385293. The reversal of 20385272 is 27258302.

It is a super-3 number, since 3×20385272³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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, 13604 + ... + 15027.

It is an arithmetic number, because the mean of its divisors is an integer number (2415825).

Almost surely, 2^20385272 is an apocalyptic number.

It is an amenable number.

20385272 is a deficient number, since it is larger than the sum of its proper divisors (18267928).

20385272 is a wasteful number, since it uses less digits than its factorization.

20385272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28726 (or 28722 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20385272 is about 4515.0052048696. The cubic root of 20385272 is about 273.1736697248.

The spelling of 20385272 in words is "twenty million, three hundred eighty-five thousand, two hundred seventy-two".