20471392872 has 384 divisors, whose sum is σ = 69919027200. Its totient is φ = 5524848000.

The previous prime is 20471392831. The next prime is 20471392873. The reversal of 20471392872 is 27829317402.

20471392872 is a `hidden beast` number, since 20 + 471 + 3 + 92 + 8 + 72 = 666.

It is a super-2 number, since 2×20471392872² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20471392873) 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 95 ways as a sum of consecutive naturals, for example, 14107747 + ... + 14109197.

It is an arithmetic number, because the mean of its divisors is an integer number (182080800).

Almost surely, 2^20471392872 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 20471392872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34959513600).

20471392872 is an abundant number, since it is smaller than the sum of its proper divisors (49447634328).

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

20471392872 is a wasteful number, since it uses less digits than its factorization.

20471392872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 20471392872 in words is "twenty billion, four hundred seventy-one million, three hundred ninety-two thousand, eight hundred seventy-two".