20263601 has 2 divisors, whose sum is σ = 20263602. Its totient is φ = 20263600.

The previous prime is 20263589. The next prime is 20263603. The reversal of 20263601 is 10636202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 5640625 = 3824^2 + 2375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20263601 is a prime.

It is a super-2 number, since 2×20263601² = 821227050974402, which contains 22 as substring.

Together with 20263603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20263603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10131800 + 10131801.

It is an arithmetic number, because the mean of its divisors is an integer number (10131801).

Almost surely, 2^20263601 is an apocalyptic number.

It is an amenable number.

20263601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20263601 is an equidigital number, since it uses as much as digits as its factorization.

20263601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20263601 is about 4501.5109685527. The cubic root of 20263601 is about 272.6290991125.

Adding to 20263601 its reverse (10636202), we get a palindrome (30899803).

The spelling of 20263601 in words is "twenty million, two hundred sixty-three thousand, six hundred one".