21038414 has 4 divisors (see below), whose sum is σ = 31557624. Its totient is φ = 10519206.

The previous prime is 21038393. The next prime is 21038419. The reversal of 21038414 is 41483012.

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

It is a super-2 number, since 2×21038414² = 885229727270792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21038414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21038419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5259602 + ... + 5259605.

It is an arithmetic number, because the mean of its divisors is an integer number (7889406).

Almost surely, 2^21038414 is an apocalyptic number.

21038414 is a deficient number, since it is larger than the sum of its proper divisors (10519210).

21038414 is a wasteful number, since it uses less digits than its factorization.

21038414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10519209.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 21038414 is about 4586.7650909982. The cubic root of 21038414 is about 276.0605394750.

The spelling of 21038414 in words is "twenty-one million, thirty-eight thousand, four hundred fourteen".