20845709130 has 128 divisors (see below), whose sum is σ = 53174403072. Its totient is φ = 5221440000.

The previous prime is 20845709113. The next prime is 20845709141. The reversal of 20845709130 is 3190754802.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8044135 + ... + 8046725.

It is an arithmetic number, because the mean of its divisors is an integer number (415425024).

Almost surely, 2^20845709130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20845709130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26587201536).

20845709130 is an abundant number, since it is smaller than the sum of its proper divisors (32328693942).

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

20845709130 is a wasteful number, since it uses less digits than its factorization.

20845709130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20845709130 in words is "twenty billion, eight hundred forty-five million, seven hundred nine thousand, one hundred thirty".