20405771330 has 64 divisors (see below), whose sum is σ = 45073055232. Its totient is φ = 6491950080.

The previous prime is 20405771291. The next prime is 20405771333. The reversal of 20405771330 is 3317750402.

It is not an unprimeable number, because it can be changed into a prime (20405771333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36269 + ... + 205248.

It is an arithmetic number, because the mean of its divisors is an integer number (704266488).

Almost surely, 2^20405771330 is an apocalyptic number.

20405771330 is an abundant number, since it is smaller than the sum of its proper divisors (24667283902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20405771330 is a wasteful number, since it uses less digits than its factorization.

20405771330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241619.

The product of its (nonzero) digits is 17640, while the sum is 32.

The spelling of 20405771330 in words is "twenty billion, four hundred five million, seven hundred seventy-one thousand, three hundred thirty".