20288839650 has 48 divisors (see below), whose sum is σ = 50342310624. Its totient is φ = 5407562880.

The previous prime is 20288839643. The next prime is 20288839691. The reversal of 20288839650 is 5693888202.

It is a junction number, because it is equal to n+sod(n) for n = 20288839593 and 20288839602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265017 + ... + 332883.

It is an arithmetic number, because the mean of its divisors is an integer number (1048798138).

Almost surely, 2^20288839650 is an apocalyptic number.

20288839650 is an abundant number, since it is smaller than the sum of its proper divisors (30053470974).

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

20288839650 is a wasteful number, since it uses less digits than its factorization.

20288839650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69875 (or 69870 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 20288839650 in words is "twenty billion, two hundred eighty-eight million, eight hundred thirty-nine thousand, six hundred fifty".