20111303409 has 8 divisors (see below), whose sum is σ = 27739728960. Its totient is φ = 12945206736.

The previous prime is 20111303371. The next prime is 20111303423. The reversal of 20111303409 is 90430311102.

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

It is not a de Polignac number, because 20111303409 - 2¹⁶ = 20111237873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111303479) 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, 115582117 + ... + 115582290.

It is an arithmetic number, because the mean of its divisors is an integer number (3467466120).

Almost surely, 2^20111303409 is an apocalyptic number.

20111303409 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20111303409 is a deficient number, since it is larger than the sum of its proper divisors (7628425551).

20111303409 is a wasteful number, since it uses less digits than its factorization.

20111303409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231164439.

The product of its (nonzero) digits is 648, while the sum is 24.

The spelling of 20111303409 in words is "twenty billion, one hundred eleven million, three hundred three thousand, four hundred nine".