21032147547 has 48 divisors (see below), whose sum is σ = 31383306240. Its totient is φ = 13565978496.

The previous prime is 21032147519. The next prime is 21032147557. The reversal of 21032147547 is 74574123012.

21032147547 is a `hidden beast` number, since 2 + 103 + 2 + 1 + 4 + 7 + 547 = 666.

It is not a de Polignac number, because 21032147547 - 2⁷ = 21032147419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21032147557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20359743 + ... + 20360775.

It is an arithmetic number, because the mean of its divisors is an integer number (653818880).

Almost surely, 2^21032147547 is an apocalyptic number.

21032147547 is a deficient number, since it is larger than the sum of its proper divisors (10351158693).

21032147547 is a wasteful number, since it uses less digits than its factorization.

21032147547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 21032147547 in words is "twenty-one billion, thirty-two million, one hundred forty-seven thousand, five hundred forty-seven".