20278560120 has 384 divisors, whose sum is σ = 75754621440. Its totient is φ = 4251985920.

The previous prime is 20278560101. The next prime is 20278560161. The reversal of 20278560120 is 2106587202.

It is a super-2 number, since 2×20278560120² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29953222 + ... + 29953898.

It is an arithmetic number, because the mean of its divisors is an integer number (197277660).

Almost surely, 2^20278560120 is an apocalyptic number.

20278560120 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 20278560120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37877310720).

20278560120 is an abundant number, since it is smaller than the sum of its proper divisors (55476061320).

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

20278560120 is a wasteful number, since it uses less digits than its factorization.

20278560120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 20278560120 in words is "twenty billion, two hundred seventy-eight million, five hundred sixty thousand, one hundred twenty".