20114415235661 has 2 divisors, whose sum is σ = 20114415235662. Its totient is φ = 20114415235660.

The previous prime is 20114415235633. The next prime is 20114415235669. The reversal of 20114415235661 is 16653251441102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17900777126761 + 2213638108900 = 4230931^2 + 1487830^2 .

It is a cyclic number.

It is not a de Polignac number, because 20114415235661 - 2¹⁴ = 20114415219277 is a prime.

It is a super-2 number, since 2×20114415235661² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20114415235669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057207617830 + 10057207617831.

It is an arithmetic number, because the mean of its divisors is an integer number (10057207617831).

Almost surely, 2^{20114415235661} is an apocalyptic number.

It is an amenable number.

20114415235661 is a deficient number, since it is larger than the sum of its proper divisors (1).

20114415235661 is an equidigital number, since it uses as much as digits as its factorization.

20114415235661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

Adding to 20114415235661 its reverse (16653251441102), we get a palindrome (36767666676763).

The spelling of 20114415235661 in words is "twenty trillion, one hundred fourteen billion, four hundred fifteen million, two hundred thirty-five thousand, six hundred sixty-one".