21337742 has 8 divisors (see below), whose sum is σ = 32412000. Its totient is φ = 10533744.

The previous prime is 21337733. The next prime is 21337759. The reversal of 21337742 is 24773312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 67367 + ... + 67682.

It is an arithmetic number, because the mean of its divisors is an integer number (4051500).

Almost surely, 2^21337742 is an apocalyptic number.

21337742 is a deficient number, since it is larger than the sum of its proper divisors (11074258).

21337742 is a wasteful number, since it uses less digits than its factorization.

21337742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135130.

The product of its digits is 7056, while the sum is 29.

The square root of 21337742 is about 4619.2793810290. The cubic root of 21337742 is about 277.3636134165.

The spelling of 21337742 in words is "twenty-one million, three hundred thirty-seven thousand, seven hundred forty-two".