20078525 has 6 divisors (see below), whose sum is σ = 24897402. Its totient is φ = 16062800.

The previous prime is 20078521. The next prime is 20078533. The reversal of 20078525 is 52587002.

It can be written as a sum of positive squares in 3 ways, for example, as 6255001 + 13823524 = 2501^2 + 3718^2 .

It is not a de Polignac number, because 20078525 - 2² = 20078521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401546 + ... + 401595.

It is an arithmetic number, because the mean of its divisors is an integer number (4149567).

Almost surely, 2^20078525 is an apocalyptic number.

20078525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20078525 is a deficient number, since it is larger than the sum of its proper divisors (4818877).

20078525 is an equidigital number, since it uses as much as digits as its factorization.

20078525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803151 (or 803146 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 20078525 is about 4480.9067162796. The cubic root of 20078525 is about 271.7965471439.

The spelling of 20078525 in words is "twenty million, seventy-eight thousand, five hundred twenty-five".