20434008870 has 144 divisors (see below), whose sum is σ = 59571006768. Its totient is φ = 4819495680.

The previous prime is 20434008863. The next prime is 20434008877. The reversal of 20434008870 is 7880043402.

20434008870 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (20434008863) and next prime (20434008877).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434008877) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1347772 + ... + 1362848.

It is an arithmetic number, because the mean of its divisors is an integer number (413687547).

Almost surely, 2^20434008870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20434008870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29785503384).

20434008870 is an abundant number, since it is smaller than the sum of its proper divisors (39136997898).

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

20434008870 is a wasteful number, since it uses less digits than its factorization.

20434008870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15175 (or 15135 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 20434008870 in words is "twenty billion, four hundred thirty-four million, eight thousand, eight hundred seventy".