21234754 has 8 divisors (see below), whose sum is σ = 31909068. Its totient is φ = 10598400.

The previous prime is 21234713. The next prime is 21234767. The reversal of 21234754 is 45743212.

It can be written as a sum of positive squares in 2 ways, for example, as 19053225 + 2181529 = 4365^2 + 1477^2 .

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, 8047 + ... + 10354.

Almost surely, 2^21234754 is an apocalyptic number.

21234754 is a deficient number, since it is larger than the sum of its proper divisors (10674314).

21234754 is a wasteful number, since it uses less digits than its factorization.

21234754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18980.

The product of its digits is 6720, while the sum is 28.

The square root of 21234754 is about 4608.1182710516. The cubic root of 21234754 is about 276.9166557113.

Adding to 21234754 its reverse (45743212), we get a palindrome (66977966).

The spelling of 21234754 in words is "twenty-one million, two hundred thirty-four thousand, seven hundred fifty-four".