20678383278 has 144 divisors (see below), whose sum is σ = 54961096320. Its totient is φ = 5586954912.

The previous prime is 20678383277. The next prime is 20678383321. The reversal of 20678383278 is 87238387602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20678383277) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15869175 + ... + 15870477.

It is an arithmetic number, because the mean of its divisors is an integer number (381674280).

Almost surely, 2^20678383278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20678383278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27480548160).

20678383278 is an abundant number, since it is smaller than the sum of its proper divisors (34282713042).

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

20678383278 is a wasteful number, since it uses less digits than its factorization.

20678383278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 20678383278 in words is "twenty billion, six hundred seventy-eight million, three hundred eighty-three thousand, two hundred seventy-eight".