20782405278 has 16 divisors (see below), whose sum is σ = 46183122960. Its totient is φ = 6927468408.

The previous prime is 20782405201. The next prime is 20782405279. The reversal of 20782405278 is 87250428702.

20782405278 is a `hidden beast` number, since 2 + 0 + 7 + 82 + 40 + 527 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20782405279) 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, 192429625 + ... + 192429732.

It is an arithmetic number, because the mean of its divisors is an integer number (2886445185).

Almost surely, 2^20782405278 is an apocalyptic number.

20782405278 is an abundant number, since it is smaller than the sum of its proper divisors (25400717682).

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

20782405278 is a wasteful number, since it uses less digits than its factorization.

20782405278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384859368 (or 384859362 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The spelling of 20782405278 in words is "twenty billion, seven hundred eighty-two million, four hundred five thousand, two hundred seventy-eight".