20131299171527 has 2 divisors, whose sum is σ = 20131299171528. Its totient is φ = 20131299171526.

The previous prime is 20131299171517. The next prime is 20131299171619. The reversal of 20131299171527 is 72517199213102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20131299171527 - 2⁸ = 20131299171271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131299171517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065649585763 + 10065649585764.

It is an arithmetic number, because the mean of its divisors is an integer number (10065649585764).

Almost surely, 2^{20131299171527} is an apocalyptic number.

20131299171527 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131299171527 is an equidigital number, since it uses as much as digits as its factorization.

20131299171527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 50.

The spelling of 20131299171527 in words is "twenty trillion, one hundred thirty-one billion, two hundred ninety-nine million, one hundred seventy-one thousand, five hundred twenty-seven".