21074722 has 8 divisors (see below), whose sum is σ = 31640256. Its totient is φ = 10527972.

The previous prime is 21074689. The next prime is 21074737. The reversal of 21074722 is 22747012.

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, 1438 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (3955032).

Almost surely, 2^21074722 is an apocalyptic number.

21074722 is a deficient number, since it is larger than the sum of its proper divisors (10565534).

21074722 is a wasteful number, since it uses less digits than its factorization.

21074722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9392.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 21074722 is about 4590.7212940888. The cubic root of 21074722 is about 276.2192562171.

The spelling of 21074722 in words is "twenty-one million, seventy-four thousand, seven hundred twenty-two".