21479376 has 40 divisors (see below), whose sum is σ = 56674944. Its totient is φ = 7006720.

The previous prime is 21479371. The next prime is 21479377. The reversal of 21479376 is 67397412.

It is a super-2 number, since 2×21479376² = 922727186698752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21479371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2505 + ... + 7016.

Almost surely, 2^21479376 is an apocalyptic number.

It is an amenable number.

21479376 is an abundant number, since it is smaller than the sum of its proper divisors (35195568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21479376 is a wasteful number, since it uses less digits than its factorization.

21479376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579 (or 9573 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 21479376 is about 4634.5847710448. The cubic root of 21479376 is about 277.9759480943.

The spelling of 21479376 in words is "twenty-one million, four hundred seventy-nine thousand, three hundred seventy-six".