20025137 has 12 divisors (see below), whose sum is σ = 22165248. Its totient is φ = 18077400.

The previous prime is 20025127. The next prime is 20025139. The reversal of 20025137 is 73152002.

It is not a de Polignac number, because 20025137 - 2⁴ = 20025121 is a prime.

It is a super-2 number, since 2×20025137² = 802012223737538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20025139) 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, 19712 + ... + 20702.

It is an arithmetic number, because the mean of its divisors is an integer number (1847104).

Almost surely, 2^20025137 is an apocalyptic number.

It is an amenable number.

20025137 is a deficient number, since it is larger than the sum of its proper divisors (2140111).

20025137 is a wasteful number, since it uses less digits than its factorization.

20025137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20025137 is about 4474.9454745282. The cubic root of 20025137 is about 271.5554345756. Note that the first 3 decimals are identical.

Adding to 20025137 its reverse (73152002), we get a palindrome (93177139).

The spelling of 20025137 in words is "twenty million, twenty-five thousand, one hundred thirty-seven".