21130619 has 2 divisors, whose sum is σ = 21130620. Its totient is φ = 21130618.

The previous prime is 21130601. The next prime is 21130649. The reversal of 21130619 is 91603112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21130619 - 2²⁰ = 20082043 is a prime.

It is a super-2 number, since 2×21130619² = 893006118646322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130594 and 21130603.

It is not a weakly prime, because it can be changed into another prime (21130649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565309 + 10565310.

It is an arithmetic number, because the mean of its divisors is an integer number (10565310).

Almost surely, 2^21130619 is an apocalyptic number.

21130619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130619 is an equidigital number, since it uses as much as digits as its factorization.

21130619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 21130619 is about 4596.8053036865. The cubic root of 21130619 is about 276.4632483223.

The spelling of 21130619 in words is "twenty-one million, one hundred thirty thousand, six hundred nineteen".