21267060 has 24 divisors (see below), whose sum is σ = 59547936. Its totient is φ = 5671200.

The previous prime is 21267053. The next prime is 21267067. The reversal of 21267060 is 6076212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21267053) and next prime (21267067).

It is a self number, because there is not a number n which added to its sum of digits gives 21267060.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21267067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177166 + ... + 177285.

It is an arithmetic number, because the mean of its divisors is an integer number (2481164).

Almost surely, 2^21267060 is an apocalyptic number.

21267060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21267060 is an abundant number, since it is smaller than the sum of its proper divisors (38280876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21267060 is a wasteful number, since it uses less digits than its factorization.

21267060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354463 (or 354461 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21267060 is about 4611.6222742111. The cubic root of 21267060 is about 277.0570158106.

The spelling of 21267060 in words is "twenty-one million, two hundred sixty-seven thousand, sixty".