20140509 has 8 divisors (see below), whose sum is σ = 26877312. Its totient is φ = 13415360.

The previous prime is 20140493. The next prime is 20140559. The reversal of 20140509 is 90504102.

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

It is a cyclic number.

It is not a de Polignac number, because 20140509 - 2⁴ = 20140493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140559) 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, 2629 + ... + 6869.

It is an arithmetic number, because the mean of its divisors is an integer number (3359664).

Almost surely, 2^20140509 is an apocalyptic number.

It is an amenable number.

20140509 is a deficient number, since it is larger than the sum of its proper divisors (6736803).

20140509 is a wasteful number, since it uses less digits than its factorization.

20140509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5827.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20140509 is about 4487.8178438970. The cubic root of 20140509 is about 272.0759456688.

The spelling of 20140509 in words is "twenty million, one hundred forty thousand, five hundred nine".