20710507776 has 432 divisors, whose sum is σ = 67958650368. Its totient is φ = 5573836800.

The previous prime is 20710507751. The next prime is 20710507777. The reversal of 20710507776 is 67770501702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710507777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47830056 + ... + 47830488.

Almost surely, 2^20710507776 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 20710507776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33979325184).

20710507776 is an abundant number, since it is smaller than the sum of its proper divisors (47248142592).

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

20710507776 is a wasteful number, since it uses less digits than its factorization.

20710507776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 144060, while the sum is 42.

The spelling of 20710507776 in words is "twenty billion, seven hundred ten million, five hundred seven thousand, seven hundred seventy-six".