20540711397 has 32 divisors (see below), whose sum is σ = 30040174080. Its totient is φ = 12426624000.

The previous prime is 20540711371. The next prime is 20540711459. The reversal of 20540711397 is 79311704502.

It is not a de Polignac number, because 20540711397 - 2¹⁰ = 20540710373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540711497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1101483 + ... + 1119975.

It is an arithmetic number, because the mean of its divisors is an integer number (938755440).

Almost surely, 2^20540711397 is an apocalyptic number.

It is an amenable number.

20540711397 is a deficient number, since it is larger than the sum of its proper divisors (9499462683).

20540711397 is a wasteful number, since it uses less digits than its factorization.

20540711397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19293.

The product of its (nonzero) digits is 52920, while the sum is 39.

The spelling of 20540711397 in words is "twenty billion, five hundred forty million, seven hundred eleven thousand, three hundred ninety-seven".