20770117240 has 128 divisors (see below), whose sum is σ = 48866328000. Its totient is φ = 7938293760.

The previous prime is 20770117223. The next prime is 20770117243. The reversal of 20770117240 is 4271107702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770117243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21389955 + ... + 21390925.

Almost surely, 2^20770117240 is an apocalyptic number.

20770117240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20770117240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24433164000).

20770117240 is an abundant number, since it is smaller than the sum of its proper divisors (28096210760).

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

20770117240 is a wasteful number, since it uses less digits than its factorization.

20770117240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 31.

The spelling of 20770117240 in words is "twenty billion, seven hundred seventy million, one hundred seventeen thousand, two hundred forty".