20415502350449 has 2 divisors, whose sum is σ = 20415502350450. Its totient is φ = 20415502350448.

The previous prime is 20415502350443. The next prime is 20415502350457. The reversal of 20415502350449 is 94405320551402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19802989503025 + 612512847424 = 4450055^2 + 782632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20415502350449 is a prime.

It is a super-2 number, since 2×20415502350449² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20415502350443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207751175224 + 10207751175225.

It is an arithmetic number, because the mean of its divisors is an integer number (10207751175225).

Almost surely, 2^{20415502350449} is an apocalyptic number.

It is an amenable number.

20415502350449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415502350449 is an equidigital number, since it uses as much as digits as its factorization.

20415502350449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 20415502350449 in words is "twenty trillion, four hundred fifteen billion, five hundred two million, three hundred fifty thousand, four hundred forty-nine".