20140545 has 16 divisors (see below), whose sum is σ = 33265152. Its totient is φ = 10394880.

The previous prime is 20140493. The next prime is 20140559. The reversal of 20140545 is 54504102.

It is not a de Polignac number, because 20140545 - 2¹⁰ = 20139521 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21192 + ... + 22121.

It is an arithmetic number, because the mean of its divisors is an integer number (2079072).

Almost surely, 2^20140545 is an apocalyptic number.

It is an amenable number.

20140545 is a deficient number, since it is larger than the sum of its proper divisors (13124607).

20140545 is a wasteful number, since it uses less digits than its factorization.

20140545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43352.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20140545 is about 4487.8218547531. The cubic root of 20140545 is about 272.0761077754.

Adding to 20140545 its reverse (54504102), we get a palindrome (74644647).

The spelling of 20140545 in words is "twenty million, one hundred forty thousand, five hundred forty-five".