20741530 has 24 divisors (see below), whose sum is σ = 39665628. Its totient is φ = 7807488.

The previous prime is 20741507. The next prime is 20741537. The reversal of 20741530 is 3514702.

It can be written as a sum of positive squares in 6 ways, for example, as 18948609 + 1792921 = 4353^2 + 1339^2 .

It is a super-2 number, since 2×20741530² = 860422133481800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20741537) 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, 699 + ... + 6478.

Almost surely, 2^20741530 is an apocalyptic number.

20741530 is a deficient number, since it is larger than the sum of its proper divisors (18924098).

20741530 is a wasteful number, since it uses less digits than its factorization.

20741530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7218 (or 7201 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20741530 is about 4554.2869913961. The cubic root of 20741530 is about 274.7558383791.

The spelling of 20741530 in words is "twenty million, seven hundred forty-one thousand, five hundred thirty".