21462734 has 4 divisors (see below), whose sum is σ = 32194104. Its totient is φ = 10731366.

The previous prime is 21462731. The next prime is 21462751. The reversal of 21462734 is 43726412.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21462697 and 21462706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21462731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5365682 + ... + 5365685.

It is an arithmetic number, because the mean of its divisors is an integer number (8048526).

Almost surely, 2^21462734 is an apocalyptic number.

21462734 is a deficient number, since it is larger than the sum of its proper divisors (10731370).

21462734 is a wasteful number, since it uses less digits than its factorization.

21462734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10731369.

The product of its digits is 8064, while the sum is 29.

The square root of 21462734 is about 4632.7890087937. The cubic root of 21462734 is about 277.9041385751.

The spelling of 21462734 in words is "twenty-one million, four hundred sixty-two thousand, seven hundred thirty-four".