21060873 has 48 divisors (see below), whose sum is σ = 34444800. Its totient is φ = 12337920.

The previous prime is 21060869. The next prime is 21060883. The reversal of 21060873 is 37806012.

21060873 = 72³ + 73³ + ... + 102³.

It is not a de Polignac number, because 21060873 - 2² = 21060869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21060883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153661 + ... + 153797.

It is an arithmetic number, because the mean of its divisors is an integer number (717600).

Almost surely, 2^21060873 is an apocalyptic number.

It is an amenable number.

21060873 is a deficient number, since it is larger than the sum of its proper divisors (13383927).

21060873 is a wasteful number, since it uses less digits than its factorization.

21060873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21060873 is about 4589.2126775734. The cubic root of 21060873 is about 276.1587382386.

Adding to 21060873 its reverse (37806012), we get a palindrome (58866885).

It can be divided in two parts, 210608 and 73, that added together give a square (210681 = 459²).

The spelling of 21060873 in words is "twenty-one million, sixty thousand, eight hundred seventy-three".