21630907341 has 6 divisors (see below), whose sum is σ = 31244643950. Its totient is φ = 14420604888.

The previous prime is 21630907307. The next prime is 21630907343. The reversal of 21630907341 is 14370903612.

21630907341 is a `hidden beast` number, since 2 + 1 + 6 + 309 + 0 + 7 + 341 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13930844841 + 7700062500 = 118029^2 + 87750^2 .

It is not a de Polignac number, because 21630907341 - 2⁷ = 21630907213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21630907296 and 21630907305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21630907343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1201717066 + ... + 1201717083.

Almost surely, 2^21630907341 is an apocalyptic number.

It is an amenable number.

21630907341 is a deficient number, since it is larger than the sum of its proper divisors (9613736609).

21630907341 is a wasteful number, since it uses less digits than its factorization.

21630907341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403434155 (or 2403434152 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 21630907341 in words is "twenty-one billion, six hundred thirty million, nine hundred seven thousand, three hundred forty-one".