20617894060 has 24 divisors (see below), whose sum is σ = 44467783920. Its totient is φ = 8024261184.

The previous prime is 20617894051. The next prime is 20617894123. The reversal of 20617894060 is 6049871602.

It is a junction number, because it is equal to n+sod(n) for n = 20617893998 and 20617894016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13930270 + ... + 13931749.

It is an arithmetic number, because the mean of its divisors is an integer number (1852824330).

Almost surely, 2^20617894060 is an apocalyptic number.

20617894060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20617894060 is an abundant number, since it is smaller than the sum of its proper divisors (23849889860).

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

20617894060 is a wasteful number, since it uses less digits than its factorization.

20617894060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27862065 (or 27862063 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 20617894060 in words is "twenty billion, six hundred seventeen million, eight hundred ninety-four thousand, sixty".