20776277740 has 96 divisors (see below), whose sum is σ = 45596162304. Its totient is φ = 7945217280.

The previous prime is 20776277689. The next prime is 20776277741. The reversal of 20776277740 is 4777267702.

It is not an unprimeable number, because it can be changed into a prime (20776277741) 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, 10371579 + ... + 10373581.

It is an arithmetic number, because the mean of its divisors is an integer number (474960024).

Almost surely, 2^20776277740 is an apocalyptic number.

20776277740 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 20776277740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22798081152).

20776277740 is an abundant number, since it is smaller than the sum of its proper divisors (24819884564).

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

20776277740 is a wasteful number, since it uses less digits than its factorization.

20776277740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 1613472, while the sum is 49.

The spelling of 20776277740 in words is "twenty billion, seven hundred seventy-six million, two hundred seventy-seven thousand, seven hundred forty".