20131780611 has 8 divisors (see below), whose sum is σ = 26843739840. Its totient is φ = 13420504232.

The previous prime is 20131780597. The next prime is 20131780621. The reversal of 20131780611 is 11608713102.

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 20131780611 - 2¹⁴ = 20131764227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20131780621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97425 + ... + 223058.

It is an arithmetic number, because the mean of its divisors is an integer number (3355467480).

Almost surely, 2^20131780611 is an apocalyptic number.

20131780611 is a deficient number, since it is larger than the sum of its proper divisors (6711959229).

20131780611 is a wasteful number, since it uses less digits than its factorization.

20131780611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341425.

The product of its (nonzero) digits is 2016, while the sum is 30.

The spelling of 20131780611 in words is "twenty billion, one hundred thirty-one million, seven hundred eighty thousand, six hundred eleven".