21346742 has 8 divisors (see below), whose sum is σ = 32701536. Its totient is φ = 10446232.

The previous prime is 21346711. The next prime is 21346751. The reversal of 21346742 is 24764312.

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, 113453 + ... + 113640.

It is an arithmetic number, because the mean of its divisors is an integer number (4087692).

Almost surely, 2^21346742 is an apocalyptic number.

21346742 is a deficient number, since it is larger than the sum of its proper divisors (11354794).

21346742 is a wasteful number, since it uses less digits than its factorization.

21346742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227142.

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

The square root of 21346742 is about 4620.2534562511. The cubic root of 21346742 is about 277.4026041344.

The spelling of 21346742 in words is "twenty-one million, three hundred forty-six thousand, seven hundred forty-two".