20540588387 has 4 divisors (see below), whose sum is σ = 22407914616. Its totient is φ = 18673262160.

The previous prime is 20540588353. The next prime is 20540588389. The reversal of 20540588387 is 78388504502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20540588387 - 2¹⁶ = 20540522851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540588389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933663098 + ... + 933663119.

It is an arithmetic number, because the mean of its divisors is an integer number (5601978654).

Almost surely, 2^20540588387 is an apocalyptic number.

20540588387 is a deficient number, since it is larger than the sum of its proper divisors (1867326229).

20540588387 is a wasteful number, since it uses less digits than its factorization.

20540588387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867326228.

The product of its (nonzero) digits is 2150400, while the sum is 50.

The spelling of 20540588387 in words is "twenty billion, five hundred forty million, five hundred eighty-eight thousand, three hundred eighty-seven".