21060604 has 12 divisors (see below), whose sum is σ = 37270800. Its totient is φ = 10411808.

The previous prime is 21060553. The next prime is 21060619. The reversal of 21060604 is 40606012.

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, 29224 + ... + 29935.

It is an arithmetic number, because the mean of its divisors is an integer number (3105900).

Almost surely, 2^21060604 is an apocalyptic number.

It is an amenable number.

21060604 is a deficient number, since it is larger than the sum of its proper divisors (16210196).

21060604 is a wasteful number, since it uses less digits than its factorization.

21060604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59252 (or 59250 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21060604 is about 4589.1833696204. The cubic root of 21060604 is about 276.1575624878.

Adding to 21060604 its reverse (40606012), we get a palindrome (61666616).

The spelling of 21060604 in words is "twenty-one million, sixty thousand, six hundred four".