21062712 has 48 divisors (see below), whose sum is σ = 57886920. Its totient is φ = 6381760.

The previous prime is 21062707. The next prime is 21062719. The reversal of 21062712 is 21726012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 723 + ... + 6530.

Almost surely, 2^21062712 is an apocalyptic number.

21062712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21062712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28943460).

21062712 is an abundant number, since it is smaller than the sum of its proper divisors (36824208).

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

21062712 is a wasteful number, since it uses less digits than its factorization.

21062712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284 (or 7269 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21062712 is about 4589.4130343651. The cubic root of 21062712 is about 276.1667759102.

Adding to 21062712 its reverse (21726012), we get a palindrome (42788724).

The spelling of 21062712 in words is "twenty-one million, sixty-two thousand, seven hundred twelve".