21702337051 has 2 divisors, whose sum is σ = 21702337052. Its totient is φ = 21702337050.

The previous prime is 21702336979. The next prime is 21702337061. The reversal of 21702337051 is 15073320712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21702337051 - 2¹¹ = 21702335003 is a prime.

It is not a weakly prime, because it can be changed into another prime (21702337061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10851168525 + 10851168526.

It is an arithmetic number, because the mean of its divisors is an integer number (10851168526).

Almost surely, 2^21702337051 is an apocalyptic number.

21702337051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21702337051 is an equidigital number, since it uses as much as digits as its factorization.

21702337051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

Adding to 21702337051 its reverse (15073320712), we get a palindrome (36775657763).

The spelling of 21702337051 in words is "twenty-one billion, seven hundred two million, three hundred thirty-seven thousand, fifty-one".