20892321644533 has 2 divisors, whose sum is σ = 20892321644534. Its totient is φ = 20892321644532.

The previous prime is 20892321644507. The next prime is 20892321644569. The reversal of 20892321644533 is 33544612329802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19682337044484 + 1209984600049 = 4436478^2 + 1099993^2 .

It is a cyclic number.

It is not a de Polignac number, because 20892321644533 - 2²⁹ = 20891784773621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20892321644333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446160822266 + 10446160822267.

It is an arithmetic number, because the mean of its divisors is an integer number (10446160822267).

Almost surely, 2^{20892321644533} is an apocalyptic number.

It is an amenable number.

20892321644533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20892321644533 is an equidigital number, since it uses as much as digits as its factorization.

20892321644533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 20892321644533 in words is "twenty trillion, eight hundred ninety-two billion, three hundred twenty-one million, six hundred forty-four thousand, five hundred thirty-three".