21477430752233 has 2 divisors, whose sum is σ = 21477430752234. Its totient is φ = 21477430752232.

The previous prime is 21477430752179. The next prime is 21477430752289. The reversal of 21477430752233 is 33225703477412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10995040279129 + 10482390473104 = 3315877^2 + 3237652^2 .

It is a cyclic number.

It is not a de Polignac number, because 21477430752233 - 2¹⁰ = 21477430751209 is a prime.

It is a super-2 number, since 2×21477430752233² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21477430754233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738715376116 + 10738715376117.

It is an arithmetic number, because the mean of its divisors is an integer number (10738715376117).

Almost surely, 2^{21477430752233} is an apocalyptic number.

It is an amenable number.

21477430752233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21477430752233 is an equidigital number, since it uses as much as digits as its factorization.

21477430752233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 50.

The spelling of 21477430752233 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty million, seven hundred fifty-two thousand, two hundred thirty-three".