20289687260 has 24 divisors (see below), whose sum is σ = 42614522496. Its totient is φ = 8114697920.

The previous prime is 20289687241. The next prime is 20289687283. The reversal of 20289687260 is 6278698202.

It is a junction number, because it is equal to n+sod(n) for n = 20289687199 and 20289687208.

It is a congruent number.

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, 75125 + ... + 214995.

It is an arithmetic number, because the mean of its divisors is an integer number (1775605104).

Almost surely, 2^20289687260 is an apocalyptic number.

20289687260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20289687260 is an abundant number, since it is smaller than the sum of its proper divisors (22324835236).

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

20289687260 is a wasteful number, since it uses less digits than its factorization.

20289687260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147133 (or 147131 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 20289687260 in words is "twenty billion, two hundred eighty-nine million, six hundred eighty-seven thousand, two hundred sixty".