21060028 has 12 divisors (see below), whose sum is σ = 40205592. Its totient is φ = 9572720.

The previous prime is 21060023. The next prime is 21060049. The reversal of 21060028 is 82006012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21059987 and 21060014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060023) 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, 239275 + ... + 239362.

It is an arithmetic number, because the mean of its divisors is an integer number (3350466).

Almost surely, 2^21060028 is an apocalyptic number.

It is an amenable number.

21060028 is a deficient number, since it is larger than the sum of its proper divisors (19145564).

21060028 is a wasteful number, since it uses less digits than its factorization.

21060028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478652 (or 478650 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21060028 is about 4589.1206129279. The cubic root of 21060028 is about 276.1550448613.

The spelling of 21060028 in words is "twenty-one million, sixty thousand, twenty-eight".