20409141 has 12 divisors (see below), whose sum is σ = 27583712. Its totient is φ = 13421568.

The previous prime is 20409131. The next prime is 20409149. The reversal of 20409141 is 14190402.

It is not a de Polignac number, because 20409141 - 2⁷ = 20409013 is a prime.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79285 + ... + 79541.

Almost surely, 2^20409141 is an apocalyptic number.

It is an amenable number.

20409141 is a deficient number, since it is larger than the sum of its proper divisors (7174571).

20409141 is an equidigital number, since it uses as much as digits as its factorization.

20409141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20409141 is about 4517.6477286305. The cubic root of 20409141 is about 273.2802473083.

Adding to 20409141 its reverse (14190402), we get a palindrome (34599543).

The spelling of 20409141 in words is "twenty million, four hundred nine thousand, one hundred forty-one".