21480376 has 16 divisors (see below), whose sum is σ = 40325040. Its totient is φ = 10727040.

The previous prime is 21480353. The next prime is 21480379. The reversal of 21480376 is 67308412.

It is a super-2 number, since 2×21480376² = 922813106202752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21480379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11200 + ... + 12976.

It is an arithmetic number, because the mean of its divisors is an integer number (2520315).

Almost surely, 2^21480376 is an apocalyptic number.

It is an amenable number.

21480376 is a deficient number, since it is larger than the sum of its proper divisors (18844664).

21480376 is a wasteful number, since it uses less digits than its factorization.

21480376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294 (or 3290 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21480376 is about 4634.6926543192. The cubic root of 21480376 is about 277.9802618700.

Adding to 21480376 its reverse (67308412), we get a palindrome (88788788).

The spelling of 21480376 in words is "twenty-one million, four hundred eighty thousand, three hundred seventy-six".