21364674 has 8 divisors (see below), whose sum is σ = 42729360. Its totient is φ = 7121556.

The previous prime is 21364669. The next prime is 21364703. The reversal of 21364674 is 47646312.

It is a happy number.

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

21364674 is an admirable 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, 1780384 + ... + 1780395.

It is an arithmetic number, because the mean of its divisors is an integer number (5341170).

Almost surely, 2^21364674 is an apocalyptic number.

21364674 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21364674 is a wasteful number, since it uses less digits than its factorization.

21364674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560784.

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

The square root of 21364674 is about 4622.1936350612. The cubic root of 21364674 is about 277.4802583148.

The spelling of 21364674 in words is "twenty-one million, three hundred sixty-four thousand, six hundred seventy-four".