21044474 has 32 divisors (see below), whose sum is σ = 36218880. Its totient is φ = 9082800.

The previous prime is 21044473. The next prime is 21044477. The reversal of 21044474 is 47444012.

It is not an unprimeable number, because it can be changed into a prime (21044473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39977 + ... + 40499.

It is an arithmetic number, because the mean of its divisors is an integer number (1131840).

Almost surely, 2^21044474 is an apocalyptic number.

21044474 is a deficient number, since it is larger than the sum of its proper divisors (15174406).

21044474 is a wasteful number, since it uses less digits than its factorization.

21044474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 21044474 is about 4587.4256397243. The cubic root of 21044474 is about 276.0870428395.

Adding to 21044474 its reverse (47444012), we get a palindrome (68488486).

The spelling of 21044474 in words is "twenty-one million, forty-four thousand, four hundred seventy-four".