21030014 has 4 divisors (see below), whose sum is σ = 31545024. Its totient is φ = 10515006.

The previous prime is 21030001. The next prime is 21030043. The reversal of 21030014 is 41003012.

It is a happy number.

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

It is a super-2 number, since 2×21030014² = 884522977680392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21029977 and 21030004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257502 + ... + 5257505.

It is an arithmetic number, because the mean of its divisors is an integer number (7886256).

Almost surely, 2^21030014 is an apocalyptic number.

21030014 is a deficient number, since it is larger than the sum of its proper divisors (10515010).

21030014 is a wasteful number, since it uses less digits than its factorization.

21030014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10515009.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21030014 is about 4585.8493215543. The cubic root of 21030014 is about 276.0237937199.

Adding to 21030014 its reverse (41003012), we get a palindrome (62033026).

The spelling of 21030014 in words is "twenty-one million, thirty thousand, fourteen".