20230521157643 has 2 divisors, whose sum is σ = 20230521157644. Its totient is φ = 20230521157642.

The previous prime is 20230521157603. The next prime is 20230521157673. The reversal of 20230521157643 is 34675112503202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20230521157643 - 2³² = 20226226190347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20230521157643.

It is not a weakly prime, because it can be changed into another prime (20230521157603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115260578821 + 10115260578822.

It is an arithmetic number, because the mean of its divisors is an integer number (10115260578822).

Almost surely, 2^{20230521157643} is an apocalyptic number.

20230521157643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20230521157643 is an equidigital number, since it uses as much as digits as its factorization.

20230521157643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 20230521157643 in words is "twenty trillion, two hundred thirty billion, five hundred twenty-one million, one hundred fifty-seven thousand, six hundred forty-three".