20540687412 has 48 divisors (see below), whose sum is σ = 54782179200. Its totient is φ = 5868016512.

The previous prime is 20540687411. The next prime is 20540687423. The reversal of 20540687412 is 21478604502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540687411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248214 + ... + 1264562.

It is an arithmetic number, because the mean of its divisors is an integer number (1141295400).

Almost surely, 2^20540687412 is an apocalyptic number.

It is an amenable number.

20540687412 is an abundant number, since it is smaller than the sum of its proper divisors (34241491788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20540687412 is a wasteful number, since it uses less digits than its factorization.

20540687412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31320 (or 31318 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 20540687412 in words is "twenty billion, five hundred forty million, six hundred eighty-seven thousand, four hundred twelve".