21423034 has 8 divisors (see below), whose sum is σ = 32171328. Its totient is φ = 10699260.

The previous prime is 21423019. The next prime is 21423053. The reversal of 21423034 is 43032412.

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, 3762 + ... + 7549.

It is an arithmetic number, because the mean of its divisors is an integer number (4021416).

Almost surely, 2^21423034 is an apocalyptic number.

21423034 is a deficient number, since it is larger than the sum of its proper divisors (10748294).

21423034 is a wasteful number, since it uses less digits than its factorization.

21423034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12260.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 21423034 is about 4628.5023495727. The cubic root of 21423034 is about 277.7326847454.

Adding to 21423034 its reverse (43032412), we get a palindrome (64455446).

The spelling of 21423034 in words is "twenty-one million, four hundred twenty-three thousand, thirty-four".