20125385 has 16 divisors (see below), whose sum is σ = 27705216. Its totient is φ = 13747968.

The previous prime is 20125381. The next prime is 20125387. The reversal of 20125385 is 58352102.

It is a cyclic number.

It is not a de Polignac number, because 20125385 - 2² = 20125381 is a prime.

It is a super-2 number, since 2×20125385² = 810062242796450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20125381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9809 + ... + 11681.

It is an arithmetic number, because the mean of its divisors is an integer number (1731576).

Almost surely, 2^20125385 is an apocalyptic number.

It is an amenable number.

20125385 is a deficient number, since it is larger than the sum of its proper divisors (7579831).

20125385 is a wasteful number, since it uses less digits than its factorization.

20125385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20125385 is about 4486.1325214487. The cubic root of 20125385 is about 272.0078257913.

Adding to 20125385 its reverse (58352102), we get a palindrome (78477487).

The spelling of 20125385 in words is "twenty million, one hundred twenty-five thousand, three hundred eighty-five".