21434194 has 8 divisors (see below), whose sum is σ = 32318460. Its totient is φ = 10661376.

The previous prime is 21434177. The next prime is 21434213. The reversal of 21434194 is 49143412.

It can be written as a sum of positive squares in 2 ways, for example, as 16703569 + 4730625 = 4087^2 + 2175^2 .

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

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, 27379 + ... + 28150.

Almost surely, 2^21434194 is an apocalyptic number.

21434194 is a deficient number, since it is larger than the sum of its proper divisors (10884266).

21434194 is a wasteful number, since it uses less digits than its factorization.

21434194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55724.

The product of its digits is 3456, while the sum is 28.

The square root of 21434194 is about 4629.7077661554. The cubic root of 21434194 is about 277.7809032300.

The spelling of 21434194 in words is "twenty-one million, four hundred thirty-four thousand, one hundred ninety-four".