20275236 has 72 divisors (see below), whose sum is σ = 54722304. Its totient is φ = 6314880.

The previous prime is 20275219. The next prime is 20275247. The reversal of 20275236 is 63257202.

It is a super-2 number, since 2×20275236² = 822170389711392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38656 + ... + 39176.

It is an arithmetic number, because the mean of its divisors is an integer number (760032).

Almost surely, 2^20275236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20275236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27361152).

20275236 is an abundant number, since it is smaller than the sum of its proper divisors (34447068).

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

20275236 is a wasteful number, since it uses less digits than its factorization.

20275236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20275236 is about 4502.8031269421. The cubic root of 20275236 is about 272.6812687253.

The spelling of 20275236 in words is "twenty million, two hundred seventy-five thousand, two hundred thirty-six".