20061547 has 16 divisors (see below), whose sum is σ = 23514624. Its totient is φ = 16912000.

The previous prime is 20061539. The next prime is 20061553. The reversal of 20061547 is 74516002.

It is a cyclic number.

It is not a de Polignac number, because 20061547 - 2³ = 20061539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20065547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12522 + ... + 14032.

It is an arithmetic number, because the mean of its divisors is an integer number (1469664).

Almost surely, 2^20061547 is an apocalyptic number.

20061547 is a deficient number, since it is larger than the sum of its proper divisors (3453077).

20061547 is a wasteful number, since it uses less digits than its factorization.

20061547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20061547 is about 4479.0118329828. The cubic root of 20061547 is about 271.7199169623.

Adding to 20061547 its reverse (74516002), we get a palindrome (94577549).

It can be divided in two parts, 2006 and 1547, that added together give a palindrome (3553).

The spelling of 20061547 in words is "twenty million, sixty-one thousand, five hundred forty-seven".