21130419 has 4 divisors (see below), whose sum is σ = 28173896. Its totient is φ = 14086944.

The previous prime is 21130409. The next prime is 21130423. The reversal of 21130419 is 91403112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21130419 - 2²³ = 12741811 is a prime.

It is a super-2 number, since 2×21130419² = 892989214231122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130395 and 21130404.

It is not an unprimeable number, because it can be changed into a prime (21130409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3521734 + ... + 3521739.

It is an arithmetic number, because the mean of its divisors is an integer number (7043474).

Almost surely, 2^21130419 is an apocalyptic number.

21130419 is a deficient number, since it is larger than the sum of its proper divisors (7043477).

21130419 is an equidigital number, since it uses as much as digits as its factorization.

21130419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7043476.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21130419 is about 4596.7835493963. The cubic root of 21130419 is about 276.4623760838.

The spelling of 21130419 in words is "twenty-one million, one hundred thirty thousand, four hundred nineteen".