21832416761 has 2 divisors, whose sum is σ = 21832416762. Its totient is φ = 21832416760.

The previous prime is 21832416757. The next prime is 21832416791. The reversal of 21832416761 is 16761423812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20375849536 + 1456567225 = 142744^2 + 38165^2 .

It is a cyclic number.

It is not a de Polignac number, because 21832416761 - 2² = 21832416757 is a prime.

It is a super-2 number, since 2×21832416761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21832416701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10916208380 + 10916208381.

It is an arithmetic number, because the mean of its divisors is an integer number (10916208381).

Almost surely, 2^21832416761 is an apocalyptic number.

It is an amenable number.

21832416761 is a deficient number, since it is larger than the sum of its proper divisors (1).

21832416761 is an equidigital number, since it uses as much as digits as its factorization.

21832416761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The spelling of 21832416761 in words is "twenty-one billion, eight hundred thirty-two million, four hundred sixteen thousand, seven hundred sixty-one".