21476038 has 4 divisors (see below), whose sum is σ = 32214060. Its totient is φ = 10738018.

The previous prime is 21476027. The next prime is 21476051. The reversal of 21476038 is 83067412.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21476038² = 922440416354888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5369008 + ... + 5369011.

It is an arithmetic number, because the mean of its divisors is an integer number (8053515).

Almost surely, 2^21476038 is an apocalyptic number.

21476038 is a deficient number, since it is larger than the sum of its proper divisors (10738022).

21476038 is a wasteful number, since it uses less digits than its factorization.

21476038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10738021.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21476038 is about 4634.2246384913. The cubic root of 21476038 is about 277.9615477413.

The spelling of 21476038 in words is "twenty-one million, four hundred seventy-six thousand, thirty-eight".