20278325 has 12 divisors (see below), whose sum is σ = 25215648. Its totient is φ = 16177200.

The previous prime is 20278267. The next prime is 20278351. The reversal of 20278325 is 52387202.

It is not a de Polignac number, because 20278325 - 2⁶ = 20278261 is a prime.

It is a super-2 number, since 2×20278325² = 822420929611250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10160 + ... + 11990.

It is an arithmetic number, because the mean of its divisors is an integer number (2101304).

Almost surely, 2^20278325 is an apocalyptic number.

20278325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20278325 is a deficient number, since it is larger than the sum of its proper divisors (4937323).

20278325 is a wasteful number, since it uses less digits than its factorization.

20278325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 2279 counting only the distinct ones).

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

The square root of 20278325 is about 4503.1461224348. The cubic root of 20278325 is about 272.6951159898.

The spelling of 20278325 in words is "twenty million, two hundred seventy-eight thousand, three hundred twenty-five".