21084754 has 8 divisors (see below), whose sum is σ = 31691520. Its totient is φ = 10520916.

The previous prime is 21084751. The next prime is 21084773. The reversal of 21084754 is 45748012.

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

It is a cake number, because a cake can be divided into 21084754 parts by 502 planar cuts.

It is not an unprimeable number, because it can be changed into a prime (21084751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9474 + ... + 11485.

It is an arithmetic number, because the mean of its divisors is an integer number (3961440).

Almost surely, 2^21084754 is an apocalyptic number.

21084754 is a deficient number, since it is larger than the sum of its proper divisors (10606766).

21084754 is a wasteful number, since it uses less digits than its factorization.

21084754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21464.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 21084754 is about 4591.8138028452. The cubic root of 21084754 is about 276.2630779419.

The spelling of 21084754 in words is "twenty-one million, eighty-four thousand, seven hundred fifty-four".