21057062 has 12 divisors (see below), whose sum is σ = 34202700. Its totient is φ = 9718488.

The previous prime is 21057061. The next prime is 21057083. The reversal of 21057062 is 26075012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21057061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30812 + ... + 31487.

It is an arithmetic number, because the mean of its divisors is an integer number (2850225).

Almost surely, 2^21057062 is an apocalyptic number.

21057062 is a deficient number, since it is larger than the sum of its proper divisors (13145638).

21057062 is a wasteful number, since it uses less digits than its factorization.

21057062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62327 (or 62314 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21057062 is about 4588.7974459547. The cubic root of 21057062 is about 276.1420801061.

The spelling of 21057062 in words is "twenty-one million, fifty-seven thousand, sixty-two".