21134037 has 4 divisors (see below), whose sum is σ = 28178720. Its totient is φ = 14089356.

The previous prime is 21134021. The next prime is 21134063. The reversal of 21134037 is 73043112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21134037 - 2⁴ = 21134021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3522337 + ... + 3522342.

It is an arithmetic number, because the mean of its divisors is an integer number (7044680).

Almost surely, 2^21134037 is an apocalyptic number.

It is an amenable number.

21134037 is a deficient number, since it is larger than the sum of its proper divisors (7044683).

21134037 is an equidigital number, since it uses as much as digits as its factorization.

21134037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044682.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 21134037 is about 4597.1770685933. The cubic root of 21134037 is about 276.4781540292.

Adding to 21134037 its reverse (73043112), we get a palindrome (94177149).

The spelling of 21134037 in words is "twenty-one million, one hundred thirty-four thousand, thirty-seven".