20540756049 has 8 divisors (see below), whose sum is σ = 29877463392. Its totient is φ = 12448943040.

The previous prime is 20540756029. The next prime is 20540756051. The reversal of 20540756049 is 94065704502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20540756049 - 2¹¹ = 20540754001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20540756049.

It is not an unprimeable number, because it can be changed into a prime (20540756029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311223544 + ... + 311223609.

It is an arithmetic number, because the mean of its divisors is an integer number (3734682924).

Almost surely, 2^20540756049 is an apocalyptic number.

It is an amenable number.

20540756049 is a deficient number, since it is larger than the sum of its proper divisors (9336707343).

20540756049 is a wasteful number, since it uses less digits than its factorization.

20540756049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622447167.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 20540756049 in words is "twenty billion, five hundred forty million, seven hundred fifty-six thousand, forty-nine".