20782118427 has 32 divisors (see below), whose sum is σ = 33083473920. Its totient is φ = 11353923360.

The previous prime is 20782118411. The next prime is 20782118519. The reversal of 20782118427 is 72481128702.

It is not a de Polignac number, because 20782118427 - 2⁴ = 20782118411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20782118407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138277 + ... + 246342.

It is an arithmetic number, because the mean of its divisors is an integer number (1033858560).

Almost surely, 2^20782118427 is an apocalyptic number.

20782118427 is a deficient number, since it is larger than the sum of its proper divisors (12301355493).

20782118427 is a wasteful number, since it uses less digits than its factorization.

20782118427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384743.

The product of its (nonzero) digits is 100352, while the sum is 42.

The spelling of 20782118427 in words is "twenty billion, seven hundred eighty-two million, one hundred eighteen thousand, four hundred twenty-seven".