20541567 has 8 divisors (see below), whose sum is σ = 27838000. Its totient is φ = 13469760.

The previous prime is 20541557. The next prime is 20541571. The reversal of 20541567 is 76514502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20541567 - 2¹⁰ = 20540543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55942 + ... + 56307.

It is an arithmetic number, because the mean of its divisors is an integer number (3479750).

Almost surely, 2^20541567 is an apocalyptic number.

20541567 is a deficient number, since it is larger than the sum of its proper divisors (7296433).

20541567 is a wasteful number, since it uses less digits than its factorization.

20541567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112313.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20541567 is about 4532.2805517752. The cubic root of 20541567 is about 273.8700388882.

The spelling of 20541567 in words is "twenty million, five hundred forty-one thousand, five hundred sixty-seven".