20542773472 has 96 divisors (see below), whose sum is σ = 46915061760. Its totient is φ = 8776373760.

The previous prime is 20542773439. The next prime is 20542773491. The reversal of 20542773472 is 27437724502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261979 + ... + 331237.

It is an arithmetic number, because the mean of its divisors is an integer number (488698560).

Almost surely, 2^20542773472 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 20542773472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23457530880).

20542773472 is an abundant number, since it is smaller than the sum of its proper divisors (26372288288).

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

20542773472 is a wasteful number, since it uses less digits than its factorization.

20542773472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69336 (or 69328 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 43.

The spelling of 20542773472 in words is "twenty billion, five hundred forty-two million, seven hundred seventy-three thousand, four hundred seventy-two".