21038174 has 8 divisors (see below), whose sum is σ = 31956960. Its totient is φ = 10385856.

The previous prime is 21038153. The next prime is 21038179. The reversal of 21038174 is 47183012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21038179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66419 + ... + 66734.

It is an arithmetic number, because the mean of its divisors is an integer number (3994620).

Almost surely, 2^21038174 is an apocalyptic number.

21038174 is a deficient number, since it is larger than the sum of its proper divisors (10918786).

21038174 is a wasteful number, since it uses less digits than its factorization.

21038174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133234.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21038174 is about 4586.7389286943. The cubic root of 21038174 is about 276.0594897320.

It can be divided in two parts, 21038 and 174, that added together give a palindrome (21212).

The spelling of 21038174 in words is "twenty-one million, thirty-eight thousand, one hundred seventy-four".