21949354 has 24 divisors (see below), whose sum is σ = 38710980. Its totient is φ = 9305856.

The previous prime is 21949331. The next prime is 21949373. The reversal of 21949354 is 45394912.

It can be written as a sum of positive squares in 2 ways, for example, as 21409129 + 540225 = 4627^2 + 735^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8352 + ... + 10660.

Almost surely, 2^21949354 is an apocalyptic number.

21949354 is a deficient number, since it is larger than the sum of its proper divisors (16761626).

21949354 is a wasteful number, since it uses less digits than its factorization.

21949354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422 (or 2415 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 21949354 is about 4685.0137673224. The cubic root of 21949354 is about 279.9887495480.

The spelling of 21949354 in words is "twenty-one million, nine hundred forty-nine thousand, three hundred fifty-four".