21367272 has 16 divisors (see below), whose sum is σ = 53418240. Its totient is φ = 7122416.

The previous prime is 21367243. The next prime is 21367289. The reversal of 21367272 is 27276312.

21367272 is a modest number, since divided by 7272 gives 2136 as remainder.

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, 445128 + ... + 445175.

It is an arithmetic number, because the mean of its divisors is an integer number (3338640).

Almost surely, 2^21367272 is an apocalyptic number.

It is an amenable number.

21367272 is an abundant number, since it is smaller than the sum of its proper divisors (32050968).

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

21367272 is a wasteful number, since it uses less digits than its factorization.

21367272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890312 (or 890308 counting only the distinct ones).

The product of its digits is 7056, while the sum is 30.

The square root of 21367272 is about 4622.4746619100. The cubic root of 21367272 is about 277.4915052996.

The spelling of 21367272 in words is "twenty-one million, three hundred sixty-seven thousand, two hundred seventy-two".