20874797460 has 144 divisors (see below), whose sum is σ = 69121503360. Its totient is φ = 5057268480.

The previous prime is 20874797443. The next prime is 20874797467. The reversal of 20874797460 is 6479747802.

20874797460 is a `hidden beast` number, since 20 + 8 + 74 + 7 + 97 + 460 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20874797397 and 20874797406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874797467) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4617081 + ... + 4621599.

It is an arithmetic number, because the mean of its divisors is an integer number (480010440).

Almost surely, 2^20874797460 is an apocalyptic number.

20874797460 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 20874797460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34560751680).

20874797460 is an abundant number, since it is smaller than the sum of its proper divisors (48246705900).

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

20874797460 is a wasteful number, since it uses less digits than its factorization.

20874797460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6878 (or 6873 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 20874797460 in words is "twenty billion, eight hundred seventy-four million, seven hundred ninety-seven thousand, four hundred sixty".