20821862676133 has 2 divisors, whose sum is σ = 20821862676134. Its totient is φ = 20821862676132.

The previous prime is 20821862676101. The next prime is 20821862676161. The reversal of 20821862676133 is 33167626812802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20605407905124 + 216454771009 = 4539318^2 + 465247^2 .

It is a cyclic number.

It is not a de Polignac number, because 20821862676133 - 2⁵ = 20821862676101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20821802676133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10410931338066 + 10410931338067.

It is an arithmetic number, because the mean of its divisors is an integer number (10410931338067).

Almost surely, 2^{20821862676133} is an apocalyptic number.

It is an amenable number.

20821862676133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20821862676133 is an equidigital number, since it uses as much as digits as its factorization.

20821862676133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 20821862676133 in words is "twenty trillion, eight hundred twenty-one billion, eight hundred sixty-two million, six hundred seventy-six thousand, one hundred thirty-three".