20156365630547 has 2 divisors, whose sum is σ = 20156365630548. Its totient is φ = 20156365630546.

The previous prime is 20156365630369. The next prime is 20156365630559. The reversal of 20156365630547 is 74503656365102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20156365630547 - 2¹² = 20156365626451 is a prime.

It is not a weakly prime, because it can be changed into another prime (20156365630147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078182815273 + 10078182815274.

It is an arithmetic number, because the mean of its divisors is an integer number (10078182815274).

Almost surely, 2^{20156365630547} is an apocalyptic number.

20156365630547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20156365630547 is an equidigital number, since it uses as much as digits as its factorization.

20156365630547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608000, while the sum is 53.

The spelling of 20156365630547 in words is "twenty trillion, one hundred fifty-six billion, three hundred sixty-five million, six hundred thirty thousand, five hundred forty-seven".