20275245 has 32 divisors (see below), whose sum is σ = 36426240. Its totient is φ = 10699200.

The previous prime is 20275219. The next prime is 20275247. The reversal of 20275245 is 54257202.

It is not a de Polignac number, because 20275245 - 2⁶ = 20275181 is a prime.

It is a super-3 number, since 3×20275245³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12892 + ... + 14378.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^20275245 is an apocalyptic number.

It is an amenable number.

20275245 is a deficient number, since it is larger than the sum of its proper divisors (16150995).

20275245 is a wasteful number, since it uses less digits than its factorization.

20275245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 20275245 is about 4502.8041263195. The cubic root of 20275245 is about 272.6813090722.

The spelling of 20275245 in words is "twenty million, two hundred seventy-five thousand, two hundred forty-five".