21702183047 has 2 divisors, whose sum is σ = 21702183048. Its totient is φ = 21702183046.

The previous prime is 21702183043. The next prime is 21702183077. The reversal of 21702183047 is 74038120712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21702183047 - 2² = 21702183043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21702182998 and 21702183016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21702183043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10851091523 + 10851091524.

It is an arithmetic number, because the mean of its divisors is an integer number (10851091524).

Almost surely, 2^21702183047 is an apocalyptic number.

21702183047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21702183047 is an equidigital number, since it uses as much as digits as its factorization.

21702183047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 21702183047 in words is "twenty-one billion, seven hundred two million, one hundred eighty-three thousand, forty-seven".