21346746 has 16 divisors (see below), whose sum is σ = 42820704. Its totient is φ = 7094384.

The previous prime is 21346711. The next prime is 21346751. The reversal of 21346746 is 64764312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3045 + ... + 7208.

It is an arithmetic number, because the mean of its divisors is an integer number (2676294).

Almost surely, 2^21346746 is an apocalyptic number.

21346746 is an abundant number, since it is smaller than the sum of its proper divisors (21473958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21346746 is a wasteful number, since it uses less digits than its factorization.

21346746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10605.

The product of its digits is 24192, while the sum is 33.

The square root of 21346746 is about 4620.2538891277. The cubic root of 21346746 is about 277.4026214611.

The spelling of 21346746 in words is "twenty-one million, three hundred forty-six thousand, seven hundred forty-six".