20115051411 has 64 divisors (see below), whose sum is σ = 33633976320. Its totient is φ = 10411113600.

The previous prime is 20115051391. The next prime is 20115051433. The reversal of 20115051411 is 11415051102.

It is not a de Polignac number, because 20115051411 - 2⁷ = 20115051283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20115051911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3418570 + ... + 3424448.

It is an arithmetic number, because the mean of its divisors is an integer number (525530880).

Almost surely, 2^20115051411 is an apocalyptic number.

20115051411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20115051411 is a deficient number, since it is larger than the sum of its proper divisors (13518924909).

20115051411 is a wasteful number, since it uses less digits than its factorization.

20115051411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136.

The product of its (nonzero) digits is 200, while the sum is 21.

The spelling of 20115051411 in words is "twenty billion, one hundred fifteen million, fifty-one thousand, four hundred eleven".