21346994 has 16 divisors (see below), whose sum is σ = 33864480. Its totient is φ = 10064160.

The previous prime is 21346993. The next prime is 21347017. The reversal of 21346994 is 49964312.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (21346991) 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 7 ways as a sum of consecutive naturals, for example, 7649 + ... + 10059.

It is an arithmetic number, because the mean of its divisors is an integer number (2116530).

Almost surely, 2^21346994 is an apocalyptic number.

21346994 is a deficient number, since it is larger than the sum of its proper divisors (12517486).

21346994 is a wasteful number, since it uses less digits than its factorization.

21346994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665.

The product of its digits is 46656, while the sum is 38.

The square root of 21346994 is about 4620.2807274017. The cubic root of 21346994 is about 277.4036957167.

The spelling of 21346994 in words is "twenty-one million, three hundred forty-six thousand, nine hundred ninety-four".