20741513 has 16 divisors (see below), whose sum is σ = 23869440. Its totient is φ = 17853696.

The previous prime is 20741507. The next prime is 20741537. The reversal of 20741513 is 31514702.

It is a cyclic number.

It is not a de Polignac number, because 20741513 - 2¹⁴ = 20725129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20741503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27698 + ... + 28436.

It is an arithmetic number, because the mean of its divisors is an integer number (1491840).

Almost surely, 2^20741513 is an apocalyptic number.

It is an amenable number.

20741513 is a deficient number, since it is larger than the sum of its proper divisors (3127927).

20741513 is a wasteful number, since it uses less digits than its factorization.

20741513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

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

The square root of 20741513 is about 4554.2851250224. The cubic root of 20741513 is about 274.7557633147.

The spelling of 20741513 in words is "twenty million, seven hundred forty-one thousand, five hundred thirteen".