20411781115 has 8 divisors (see below), whose sum is σ = 26720877168. Its totient is φ = 14844931680.

The previous prime is 20411781077. The next prime is 20411781121. The reversal of 20411781115 is 51118711402.

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

It is not a de Polignac number, because 20411781115 - 2⁹ = 20411780603 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185561592 + ... + 185561701.

It is an arithmetic number, because the mean of its divisors is an integer number (3340109646).

Almost surely, 2^20411781115 is an apocalyptic number.

20411781115 is a deficient number, since it is larger than the sum of its proper divisors (6309096053).

20411781115 is a wasteful number, since it uses less digits than its factorization.

20411781115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371123309.

The product of its (nonzero) digits is 2240, while the sum is 31.

The spelling of 20411781115 in words is "twenty billion, four hundred eleven million, seven hundred eighty-one thousand, one hundred fifteen".