21037149 has 12 divisors (see below), whose sum is σ = 34728096. Its totient is φ = 12021192.

The previous prime is 21037139. The next prime is 21037171. The reversal of 21037149 is 94173012.

It is not a de Polignac number, because 21037149 - 2⁵ = 21037117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21037139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166899 + ... + 167024.

It is an arithmetic number, because the mean of its divisors is an integer number (2894008).

Almost surely, 2^21037149 is an apocalyptic number.

It is an amenable number.

21037149 is a deficient number, since it is larger than the sum of its proper divisors (13690947).

21037149 is a wasteful number, since it uses less digits than its factorization.

21037149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333936 (or 333933 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 21037149 is about 4586.6271921751. The cubic root of 21037149 is about 276.0550063649.

The spelling of 21037149 in words is "twenty-one million, thirty-seven thousand, one hundred forty-nine".