20741457539 has 16 divisors (see below), whose sum is σ = 22762373760. Its totient is φ = 18743400000.

The previous prime is 20741457481. The next prime is 20741457551. The reversal of 20741457539 is 93575414702.

It is a cyclic number.

It is not a de Polignac number, because 20741457539 - 2⁸ = 20741457283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20741457493 and 20741457502.

It is not an unprimeable number, because it can be changed into a prime (20741457589) 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, 1431272 + ... + 1445690.

It is an arithmetic number, because the mean of its divisors is an integer number (1422648360).

Almost surely, 2^20741457539 is an apocalyptic number.

20741457539 is a deficient number, since it is larger than the sum of its proper divisors (2020916221).

20741457539 is a wasteful number, since it uses less digits than its factorization.

20741457539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15202.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 20741457539 in words is "twenty billion, seven hundred forty-one million, four hundred fifty-seven thousand, five hundred thirty-nine".