21416712 has 32 divisors (see below), whose sum is σ = 53731680. Its totient is φ = 7113600.

The previous prime is 21416701. The next prime is 21416713. The reversal of 21416712 is 21761412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21416713) 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, 6087 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (1679115).

Almost surely, 2^21416712 is an apocalyptic number.

It is an amenable number.

21416712 is an abundant number, since it is smaller than the sum of its proper divisors (32314968).

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

21416712 is a wasteful number, since it uses less digits than its factorization.

21416712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173 (or 3169 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 21416712 is about 4627.8193568894. The cubic root of 21416712 is about 277.7053621483.

The spelling of 21416712 in words is "twenty-one million, four hundred sixteen thousand, seven hundred twelve".