21494349 has 32 divisors (see below), whose sum is σ = 32947200. Its totient is φ = 13843440.

The previous prime is 21494329. The next prime is 21494353. The reversal of 21494349 is 94349412.

21494349 is a `hidden beast` number, since 214 + 9 + 434 + 9 = 666.

It is not a de Polignac number, because 21494349 - 2⁹ = 21493837 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21494329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164014 + ... + 164144.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^21494349 is an apocalyptic number.

It is an amenable number.

21494349 is a deficient number, since it is larger than the sum of its proper divisors (11452851).

21494349 is a wasteful number, since it uses less digits than its factorization.

21494349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 296 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 21494349 is about 4636.1998447004. The cubic root of 21494349 is about 278.0405242583.

The spelling of 21494349 in words is "twenty-one million, four hundred ninety-four thousand, three hundred forty-nine".