20549908432 has 80 divisors (see below), whose sum is σ = 43486502400. Its totient is φ = 9371496960.

The previous prime is 20549908411. The next prime is 20549908453. The reversal of 20549908432 is 23480994502.

It is an interprime number because it is at equal distance from previous prime (20549908411) and next prime (20549908453).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1850994 + ... + 1862062.

It is an arithmetic number, because the mean of its divisors is an integer number (543581280).

Almost surely, 2^20549908432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20549908432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21743251200).

20549908432 is an abundant number, since it is smaller than the sum of its proper divisors (22936593968).

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

20549908432 is a wasteful number, since it uses less digits than its factorization.

20549908432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11324 (or 11318 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 20549908432 in words is "twenty billion, five hundred forty-nine million, nine hundred eight thousand, four hundred thirty-two".