20571325012647 has 24 divisors (see below), whose sum is σ = 30113503265664. Its totient is φ = 13530347948304.

The previous prime is 20571325012633. The next prime is 20571325012661. The reversal of 20571325012647 is 74621052317502.

20571325012647 is a `hidden beast` number, since 2 + 0 + 5 + 7 + 132 + 501 + 2 + 6 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (20571325012633) and next prime (20571325012661).

It is not a de Polignac number, because 20571325012647 - 2⁷ = 20571325012519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20571325012697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18396813 + ... + 19482950.

It is an arithmetic number, because the mean of its divisors is an integer number (1254729302736).

Almost surely, 2^{20571325012647} is an apocalyptic number.

20571325012647 is a deficient number, since it is larger than the sum of its proper divisors (9542178253017).

20571325012647 is a wasteful number, since it uses less digits than its factorization.

20571325012647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37880579 (or 37880576 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 20571325012647 in words is "twenty trillion, five hundred seventy-one billion, three hundred twenty-five million, twelve thousand, six hundred forty-seven".