21014642 has 8 divisors (see below), whose sum is σ = 34387632. Its totient is φ = 9552100.

The previous prime is 21014641. The next prime is 21014657. The reversal of 21014642 is 24641012.

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

It is not an unprimeable number, because it can be changed into a prime (21014641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477584 + ... + 477627.

It is an arithmetic number, because the mean of its divisors is an integer number (4298454).

Almost surely, 2^21014642 is an apocalyptic number.

21014642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21014642 is a deficient number, since it is larger than the sum of its proper divisors (13372990).

21014642 is a wasteful number, since it uses less digits than its factorization.

21014642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955224.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21014642 is about 4584.1729897551. The cubic root of 21014642 is about 275.9565236426.

Adding to 21014642 its reverse (24641012), we get a palindrome (45655654).

The spelling of 21014642 in words is "twenty-one million, fourteen thousand, six hundred forty-two".