21060153 has 12 divisors (see below), whose sum is σ = 31128240. Its totient is φ = 13713336.

The previous prime is 21060139. The next prime is 21060163. The reversal of 21060153 is 35106012.

21060153 is a `hidden beast` number, since 2 + 10 + 601 + 53 = 666.

It is not a de Polignac number, because 21060153 - 2²¹ = 18963001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21060163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26823 + ... + 27596.

It is an arithmetic number, because the mean of its divisors is an integer number (2594020).

Almost surely, 2^21060153 is an apocalyptic number.

It is an amenable number.

21060153 is a deficient number, since it is larger than the sum of its proper divisors (10068087).

21060153 is a wasteful number, since it uses less digits than its factorization.

21060153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54468 (or 54465 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 21060153 is about 4589.1342320747. The cubic root of 21060153 is about 276.1555912251.

Adding to 21060153 its reverse (35106012), we get a palindrome (56166165).

The spelling of 21060153 in words is "twenty-one million, sixty thousand, one hundred fifty-three".