20415531112147 has 2 divisors, whose sum is σ = 20415531112148. Its totient is φ = 20415531112146.

The previous prime is 20415531112121. The next prime is 20415531112153. The reversal of 20415531112147 is 74121113551402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20415531112147 - 2⁷ = 20415531112019 is a prime.

It is not a weakly prime, because it can be changed into another prime (20415531112117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207765556073 + 10207765556074.

It is an arithmetic number, because the mean of its divisors is an integer number (10207765556074).

Almost surely, 2^{20415531112147} is an apocalyptic number.

20415531112147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415531112147 is an equidigital number, since it uses as much as digits as its factorization.

20415531112147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

Adding to 20415531112147 its reverse (74121113551402), we get a palindrome (94536644663549).

The spelling of 20415531112147 in words is "twenty trillion, four hundred fifteen billion, five hundred thirty-one million, one hundred twelve thousand, one hundred forty-seven".