20770238740 has 24 divisors (see below), whose sum is σ = 45913160160. Its totient is φ = 7870827168.

The previous prime is 20770238719. The next prime is 20770238743. The reversal of 20770238740 is 4783207702.

It is a junction number, because it is equal to n+sod(n) for n = 20770238693 and 20770238702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770238743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27328882 + ... + 27329641.

It is an arithmetic number, because the mean of its divisors is an integer number (1913048340).

Almost surely, 2^20770238740 is an apocalyptic number.

20770238740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20770238740 is an abundant number, since it is smaller than the sum of its proper divisors (25142921420).

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

20770238740 is a wasteful number, since it uses less digits than its factorization.

20770238740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54658551 (or 54658549 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 20770238740 in words is "twenty billion, seven hundred seventy million, two hundred thirty-eight thousand, seven hundred forty".