21949107 has 8 divisors (see below), whose sum is σ = 30537984. Its totient is φ = 13996488.

The previous prime is 21949097. The next prime is 21949111. The reversal of 21949107 is 70194912.

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

It is not a de Polignac number, because 21949107 - 2⁸ = 21948851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21949507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158983 + ... + 159120.

It is an arithmetic number, because the mean of its divisors is an integer number (3817248).

Almost surely, 2^21949107 is an apocalyptic number.

21949107 is a deficient number, since it is larger than the sum of its proper divisors (8588877).

21949107 is a wasteful number, since it uses less digits than its factorization.

21949107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318129.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 21949107 is about 4684.9874065999. The cubic root of 21949107 is about 279.9876992896.

The spelling of 21949107 in words is "twenty-one million, nine hundred forty-nine thousand, one hundred seven".