21346642 has 8 divisors (see below), whose sum is σ = 32051196. Its totient is φ = 10662912.

The previous prime is 21346627. The next prime is 21346657. The reversal of 21346642 is 24664312.

It is an interprime number because it is at equal distance from previous prime (21346627) and next prime (21346657).

It can be written as a sum of positive squares in 2 ways, for example, as 21077281 + 269361 = 4591^2 + 519^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21346642.

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, 2323 + ... + 6934.

Almost surely, 2^21346642 is an apocalyptic number.

21346642 is a deficient number, since it is larger than the sum of its proper divisors (10704554).

21346642 is a wasteful number, since it uses less digits than its factorization.

21346642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10412.

The product of its digits is 6912, while the sum is 28.

The square root of 21346642 is about 4620.2426343213. The cubic root of 21346642 is about 277.4021709644.

The spelling of 21346642 in words is "twenty-one million, three hundred forty-six thousand, six hundred forty-two".