20878349760 has 84 divisors (see below), whose sum is σ = 71812833768. Its totient is φ = 5567559168.

The previous prime is 20878349759. The next prime is 20878349761. The reversal of 20878349760 is 6794387802.

20878349760 is a `hidden beast` number, since 20 + 8 + 78 + 3 + 497 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (20878349759) and next prime (20878349761).

It is a junction number, because it is equal to n+sod(n) for n = 20878349697 and 20878349706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20878349761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3621834 + ... + 3627593.

Almost surely, 2^20878349760 is an apocalyptic number.

20878349760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20878349760 is an abundant number, since it is smaller than the sum of its proper divisors (50934484008).

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

20878349760 is a wasteful number, since it uses less digits than its factorization.

20878349760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7249450 (or 7249437 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 20878349760 in words is "twenty billion, eight hundred seventy-eight million, three hundred forty-nine thousand, seven hundred sixty".