20536555151243 has 2 divisors, whose sum is σ = 20536555151244. Its totient is φ = 20536555151242.

The previous prime is 20536555151197. The next prime is 20536555151261. The reversal of 20536555151243 is 34215155563502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20536555151243 - 2⁶ = 20536555151179 is a prime.

It is not a weakly prime, because it can be changed into another prime (20536555154243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268277575621 + 10268277575622.

It is an arithmetic number, because the mean of its divisors is an integer number (10268277575622).

Almost surely, 2^{20536555151243} is an apocalyptic number.

20536555151243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20536555151243 is an equidigital number, since it uses as much as digits as its factorization.

20536555151243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700000, while the sum is 47.

The spelling of 20536555151243 in words is "twenty trillion, five hundred thirty-six billion, five hundred fifty-five million, one hundred fifty-one thousand, two hundred forty-three".