20225387 has 12 divisors (see below), whose sum is σ = 25338096. Its totient is φ = 16002000.

The previous prime is 20225371. The next prime is 20225419. The reversal of 20225387 is 78352202.

It is not a de Polignac number, because 20225387 - 2⁴ = 20225371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20225327) 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, 15239 + ... + 16512.

It is an arithmetic number, because the mean of its divisors is an integer number (2111508).

Almost surely, 2^20225387 is an apocalyptic number.

20225387 is a deficient number, since it is larger than the sum of its proper divisors (5112709).

20225387 is a wasteful number, since it uses less digits than its factorization.

20225387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31778 (or 31771 counting only the distinct ones).

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

The square root of 20225387 is about 4497.2643907158. The cubic root of 20225387 is about 272.4576125748.

Adding to 20225387 its reverse (78352202), we get a palindrome (98577589).

The spelling of 20225387 in words is "twenty million, two hundred twenty-five thousand, three hundred eighty-seven".