20271177072 has 160 divisors (see below), whose sum is σ = 58745079360. Its totient is φ = 6692474880.

The previous prime is 20271177053. The next prime is 20271177131. The reversal of 20271177072 is 27077117202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26637172 + ... + 26637932.

It is an arithmetic number, because the mean of its divisors is an integer number (367156746).

Almost surely, 2^20271177072 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 20271177072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29372539680).

20271177072 is an abundant number, since it is smaller than the sum of its proper divisors (38473902288).

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

20271177072 is a wasteful number, since it uses less digits than its factorization.

20271177072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 19208, while the sum is 36.

The spelling of 20271177072 in words is "twenty billion, two hundred seventy-one million, one hundred seventy-seven thousand, seventy-two".