21762419837 has 2 divisors, whose sum is σ = 21762419838. Its totient is φ = 21762419836.

The previous prime is 21762419821. The next prime is 21762419839. The reversal of 21762419837 is 73891426712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19782703801 + 1979716036 = 140651^2 + 44494^2 .

It is a cyclic number.

It is not a de Polignac number, because 21762419837 - 2⁴ = 21762419821 is a prime.

It is a super-2 number, since 2×21762419837² (a number of 21 digits) contains 22 as substring.

Together with 21762419839, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21762419839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10881209918 + 10881209919.

It is an arithmetic number, because the mean of its divisors is an integer number (10881209919).

Almost surely, 2^21762419837 is an apocalyptic number.

It is an amenable number.

21762419837 is a deficient number, since it is larger than the sum of its proper divisors (1).

21762419837 is an equidigital number, since it uses as much as digits as its factorization.

21762419837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 50.

The spelling of 21762419837 in words is "twenty-one billion, seven hundred sixty-two million, four hundred nineteen thousand, eight hundred thirty-seven".