20378275 has 12 divisors (see below), whose sum is σ = 25359984. Its totient is φ = 16244000.

The previous prime is 20378273. The next prime is 20378297. The reversal of 20378275 is 57287302.

It is not a de Polignac number, because 20378275 - 2¹ = 20378273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20378275.

It is not an unprimeable number, because it can be changed into a prime (20378273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6465 + ... + 9085.

It is an arithmetic number, because the mean of its divisors is an integer number (2113332).

Almost surely, 2^20378275 is an apocalyptic number.

20378275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20378275 is a deficient number, since it is larger than the sum of its proper divisors (4981709).

20378275 is a wasteful number, since it uses less digits than its factorization.

20378275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942 (or 2937 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 20378275 is about 4514.2302776885. The cubic root of 20378275 is about 273.1424116202.

The spelling of 20378275 in words is "twenty million, three hundred seventy-eight thousand, two hundred seventy-five".