21368884783 has 2 divisors, whose sum is σ = 21368884784. Its totient is φ = 21368884782.

The previous prime is 21368884759. The next prime is 21368884847. The reversal of 21368884783 is 38748886312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21368884783 - 2¹⁷ = 21368753711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21368284783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10684442391 + 10684442392.

It is an arithmetic number, because the mean of its divisors is an integer number (10684442392).

Almost surely, 2^21368884783 is an apocalyptic number.

21368884783 is a deficient number, since it is larger than the sum of its proper divisors (1).

21368884783 is an equidigital number, since it uses as much as digits as its factorization.

21368884783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12386304, while the sum is 58.

The spelling of 21368884783 in words is "twenty-one billion, three hundred sixty-eight million, eight hundred eighty-four thousand, seven hundred eighty-three".