20025637 has 2 divisors, whose sum is σ = 20025638. Its totient is φ = 20025636.

The previous prime is 20025613. The next prime is 20025661. The reversal of 20025637 is 73652002.

It is a balanced prime because it is at equal distance from previous prime (20025613) and next prime (20025661).

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 391876 = 4431^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 20025637 - 2¹¹ = 20023589 is a prime.

It is a super-2 number, since 2×20025637² = 802052274511538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20025667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012818 + 10012819.

It is an arithmetic number, because the mean of its divisors is an integer number (10012819).

Almost surely, 2^20025637 is an apocalyptic number.

It is an amenable number.

20025637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20025637 is an equidigital number, since it uses as much as digits as its factorization.

20025637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20025637 is about 4475.0013407819. The cubic root of 20025637 is about 271.5576946781.

Adding to 20025637 its reverse (73652002), we get a palindrome (93677639).

The spelling of 20025637 in words is "twenty million, twenty-five thousand, six hundred thirty-seven".