20430342672 has 80 divisors (see below), whose sum is σ = 54523415040. Its totient is φ = 6585292800.

The previous prime is 20430342659. The next prime is 20430342677. The reversal of 20430342672 is 27624303402.

It is not an unprimeable number, because it can be changed into a prime (20430342677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2211022 + ... + 2220242.

It is an arithmetic number, because the mean of its divisors is an integer number (681542688).

Almost surely, 2^20430342672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430342672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27261707520).

20430342672 is an abundant number, since it is smaller than the sum of its proper divisors (34093072368).

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

20430342672 is a wasteful number, since it uses less digits than its factorization.

20430342672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752 (or 10746 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 33.

The spelling of 20430342672 in words is "twenty billion, four hundred thirty million, three hundred forty-two thousand, six hundred seventy-two".