20771337216 has 176 divisors, whose sum is σ = 65315348480. Its totient is φ = 5743042560.

The previous prime is 20771337211. The next prime is 20771337269. The reversal of 20771337216 is 61273317702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771337211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651045 + ... + 682203.

Almost surely, 2^20771337216 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 20771337216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32657674240).

20771337216 is an abundant number, since it is smaller than the sum of its proper divisors (44544011264).

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

20771337216 is a wasteful number, since it uses less digits than its factorization.

20771337216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31220 (or 31202 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 39.

The spelling of 20771337216 in words is "twenty billion, seven hundred seventy-one million, three hundred thirty-seven thousand, two hundred sixteen".