21130479 has 6 divisors (see below), whose sum is σ = 30521816. Its totient is φ = 14086980.

The previous prime is 21130477. The next prime is 21130481. The reversal of 21130479 is 97403112.

It is an interprime number because it is at equal distance from previous prime (21130477) and next prime (21130481).

It is not a de Polignac number, because 21130479 - 2¹ = 21130477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130477) 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, 1173907 + ... + 1173924.

Almost surely, 2^21130479 is an apocalyptic number.

21130479 is a deficient number, since it is larger than the sum of its proper divisors (9391337).

21130479 is a wasteful number, since it uses less digits than its factorization.

21130479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347837 (or 2347834 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 21130479 is about 4596.7900756941. The cubic root of 21130479 is about 276.4626377559.

It can be divided in two parts, 21130 and 479, that added together give a square (21609 = 147²).

The spelling of 21130479 in words is "twenty-one million, one hundred thirty thousand, four hundred seventy-nine".