20430715470 has 128 divisors (see below), whose sum is σ = 55743344640. Its totient is φ = 4746900480.

The previous prime is 20430715457. The next prime is 20430715511. The reversal of 20430715470 is 7451703402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

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, 1303299 + ... + 1318881.

It is an arithmetic number, because the mean of its divisors is an integer number (435494880).

Almost surely, 2^20430715470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430715470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27871672320).

20430715470 is an abundant number, since it is smaller than the sum of its proper divisors (35312629170).

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

20430715470 is a wasteful number, since it uses less digits than its factorization.

20430715470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15770.

The product of its (nonzero) digits is 23520, while the sum is 33.

The spelling of 20430715470 in words is "twenty billion, four hundred thirty million, seven hundred fifteen thousand, four hundred seventy".