21464254 has 32 divisors (see below), whose sum is σ = 38188800. Its totient is φ = 9042264.

The previous prime is 21464249. The next prime is 21464269. The reversal of 21464254 is 45246412.

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 15 ways as a sum of consecutive naturals, for example, 45729 + ... + 46195.

It is an arithmetic number, because the mean of its divisors is an integer number (1193400).

Almost surely, 2^21464254 is an apocalyptic number.

21464254 is a deficient number, since it is larger than the sum of its proper divisors (16724546).

21464254 is an equidigital number, since it uses as much as digits as its factorization.

21464254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 543 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 21464254 is about 4632.9530539387. The cubic root of 21464254 is about 277.9106988502.

It can be divided in two parts, 2146 and 4254, that added together give a square (6400 = 80²).

The spelling of 21464254 in words is "twenty-one million, four hundred sixty-four thousand, two hundred fifty-four".