20131541532 has 18 divisors (see below), whose sum is σ = 50888063408. Its totient is φ = 6710513832.

The previous prime is 20131541527. The next prime is 20131541539. The reversal of 20131541532 is 23514513102.

20131541532 is a `hidden beast` number, since 201 + 3 + 15 + 415 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 20131541496 and 20131541505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131541539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279604708 + ... + 279604779.

Almost surely, 2^20131541532 is an apocalyptic number.

It is an amenable number.

20131541532 is an abundant number, since it is smaller than the sum of its proper divisors (30756521876).

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

20131541532 is a wasteful number, since it uses less digits than its factorization.

20131541532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559209497 (or 559209492 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20131541532 in words is "twenty billion, one hundred thirty-one million, five hundred forty-one thousand, five hundred thirty-two".