21032474 has 8 divisors (see below), whose sum is σ = 31590048. Its totient is φ = 10502460.

The previous prime is 21032471. The next prime is 21032483. The reversal of 21032474 is 47423012.

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

It is not an unprimeable number, because it can be changed into a prime (21032471) by changing a digit.

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, 4862 + ... + 8105.

It is an arithmetic number, because the mean of its divisors is an integer number (3948756).

Almost surely, 2^21032474 is an apocalyptic number.

21032474 is a deficient number, since it is larger than the sum of its proper divisors (10557574).

21032474 is a wasteful number, since it uses less digits than its factorization.

21032474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13780.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 21032474 is about 4586.1175301119. The cubic root of 21032474 is about 276.0345559898.

Adding to 21032474 its reverse (47423012), we get a palindrome (68455486).

The spelling of 21032474 in words is "twenty-one million, thirty-two thousand, four hundred seventy-four".