21726074 has 8 divisors (see below), whose sum is σ = 32626368. Its totient is φ = 10850620.

The previous prime is 21726073. The next prime is 21726113. The reversal of 21726074 is 47062712.

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 (21726073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3842 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (4078296).

Almost surely, 2^21726074 is an apocalyptic number.

21726074 is a deficient number, since it is larger than the sum of its proper divisors (10900294).

21726074 is a wasteful number, since it uses less digits than its factorization.

21726074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 21726074 is about 4661.1236842633. The cubic root of 21726074 is about 279.0361159637.

Adding to 21726074 its reverse (47062712), we get a palindrome (68788786).

The spelling of 21726074 in words is "twenty-one million, seven hundred twenty-six thousand, seventy-four".