21014072 has 16 divisors (see below), whose sum is σ = 39942240. Its totient is φ = 10362816.

The previous prime is 21014069. The next prime is 21014087. The reversal of 21014072 is 27041012.

It is a self number, because there is not a number n which added to its sum of digits gives 21014072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17408 + ... + 18575.

It is an arithmetic number, because the mean of its divisors is an integer number (2496390).

Almost surely, 2^21014072 is an apocalyptic number.

It is an amenable number.

21014072 is a deficient number, since it is larger than the sum of its proper divisors (18928168).

21014072 is a wasteful number, since it uses less digits than its factorization.

21014072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36062 (or 36058 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 21014072 is about 4584.1108189048. The cubic root of 21014072 is about 275.9540286102.

Adding to 21014072 its reverse (27041012), we get a palindrome (48055084).

The spelling of 21014072 in words is "twenty-one million, fourteen thousand, seventy-two".