21049466 has 8 divisors (see below), whose sum is σ = 31596480. Its totient is φ = 10517308.

The previous prime is 21049387. The next prime is 21049493. The reversal of 21049466 is 66494012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (3949560).

Almost surely, 2^21049466 is an apocalyptic number.

21049466 is a deficient number, since it is larger than the sum of its proper divisors (10547014).

21049466 is a wasteful number, since it uses less digits than its factorization.

21049466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 21049466 is about 4587.9697034745. The cubic root of 21049466 is about 276.1088714924.

The spelling of 21049466 in words is "twenty-one million, forty-nine thousand, four hundred sixty-six".