21463976 has 16 divisors (see below), whose sum is σ = 40379040. Its totient is φ = 10696240.

The previous prime is 21463969. The next prime is 21463999. The reversal of 21463976 is 67936412.

It is a super-3 number, since 3×21463976³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (2523690).

Almost surely, 2^21463976 is an apocalyptic number.

It is an amenable number.

21463976 is a deficient number, since it is larger than the sum of its proper divisors (18915064).

21463976 is a wasteful number, since it uses less digits than its factorization.

21463976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944 (or 8940 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 21463976 is about 4632.9230513791. The cubic root of 21463976 is about 277.9094990336.

The spelling of 21463976 in words is "twenty-one million, four hundred sixty-three thousand, nine hundred seventy-six".