20654671560 has 256 divisors, whose sum is σ = 66933216000. Its totient is φ = 5080154112.

The previous prime is 20654671523. The next prime is 20654671567. The reversal of 20654671560 is 6517645602.

It is not an unprimeable number, because it can be changed into a prime (20654671567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47701104 + ... + 47701536.

It is an arithmetic number, because the mean of its divisors is an integer number (261457875).

Almost surely, 2^20654671560 is an apocalyptic number.

20654671560 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 20654671560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33466608000).

20654671560 is an abundant number, since it is smaller than the sum of its proper divisors (46278544440).

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

20654671560 is a wasteful number, since it uses less digits than its factorization.

20654671560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 20654671560 in words is "twenty billion, six hundred fifty-four million, six hundred seventy-one thousand, five hundred sixty".