21010746 has 64 divisors (see below), whose sum is σ = 46227456. Its totient is φ = 6350400.

The previous prime is 21010741. The next prime is 21010757. The reversal of 21010746 is 64701012.

It is not an unprimeable number, because it can be changed into a prime (21010741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295891 + ... + 295961.

It is an arithmetic number, because the mean of its divisors is an integer number (722304).

Almost surely, 2^21010746 is an apocalyptic number.

21010746 is an abundant number, since it is smaller than the sum of its proper divisors (25216710).

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

21010746 is a wasteful number, since it uses less digits than its factorization.

21010746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

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

The square root of 21010746 is about 4583.7480297241. The cubic root of 21010746 is about 275.9394689772.

Adding to 21010746 its reverse (64701012), we get a palindrome (85711758).

The spelling of 21010746 in words is "twenty-one million, ten thousand, seven hundred forty-six".