20540755997 has 8 divisors (see below), whose sum is σ = 20701521120. Its totient is φ = 20380176720.

The previous prime is 20540755993. The next prime is 20540756011. The reversal of 20540755997 is 79955704502.

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

It is a cyclic number.

It is not a de Polignac number, because 20540755997 - 2² = 20540755993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540755993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179738 + ... + 270900.

It is an arithmetic number, because the mean of its divisors is an integer number (2587690140).

Almost surely, 2^20540755997 is an apocalyptic number.

It is an amenable number.

20540755997 is a deficient number, since it is larger than the sum of its proper divisors (160765123).

20540755997 is a wasteful number, since it uses less digits than its factorization.

20540755997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92923.

The product of its (nonzero) digits is 3969000, while the sum is 53.

The spelling of 20540755997 in words is "twenty billion, five hundred forty million, seven hundred fifty-five thousand, nine hundred ninety-seven".