20655047140 has 48 divisors (see below), whose sum is σ = 53385357312. Its totient is φ = 6536981376.

The previous prime is 20655047137. The next prime is 20655047173. The reversal of 20655047140 is 4174055602.

It is a junction number, because it is equal to n+sod(n) for n = 20655047096 and 20655047105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5672644 + ... + 5676283.

It is an arithmetic number, because the mean of its divisors is an integer number (1112194944).

Almost surely, 2^20655047140 is an apocalyptic number.

20655047140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20655047140 is an abundant number, since it is smaller than the sum of its proper divisors (32730310172).

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

20655047140 is a wasteful number, since it uses less digits than its factorization.

20655047140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11348956 (or 11348954 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 20655047140 in words is "twenty billion, six hundred fifty-five million, forty-seven thousand, one hundred forty".