21464526 has 16 divisors (see below), whose sum is σ = 43003728. Its totient is φ = 7142400.

The previous prime is 21464503. The next prime is 21464539. The reversal of 21464526 is 62546412.

It is a junction number, because it is equal to n+sod(n) for n = 21464493 and 21464502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1056 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (2687733).

Almost surely, 2^21464526 is an apocalyptic number.

21464526 is an abundant number, since it is smaller than the sum of its proper divisors (21539202).

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

21464526 is a wasteful number, since it uses less digits than its factorization.

21464526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6227.

The product of its digits is 11520, while the sum is 30.

The square root of 21464526 is about 4632.9824087730. The cubic root of 21464526 is about 277.9118727615.

The spelling of 21464526 in words is "twenty-one million, four hundred sixty-four thousand, five hundred twenty-six".