20571341340 has 96 divisors (see below), whose sum is σ = 63316028160. Its totient is φ = 4948902400.

The previous prime is 20571341309. The next prime is 20571341359. The reversal of 20571341340 is 4314317502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20571341298 and 20571341307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32505 + ... + 205424.

It is an arithmetic number, because the mean of its divisors is an integer number (659541960).

Almost surely, 2^20571341340 is an apocalyptic number.

20571341340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20571341340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31658014080).

20571341340 is an abundant number, since it is smaller than the sum of its proper divisors (42744686820).

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

20571341340 is a wasteful number, since it uses less digits than its factorization.

20571341340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238083 (or 238081 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

Adding to 20571341340 its reverse (4314317502), we get a palindrome (24885658842).

The spelling of 20571341340 in words is "twenty billion, five hundred seventy-one million, three hundred forty-one thousand, three hundred forty".