20432203340240 has 20 divisors (see below), whose sum is σ = 47504872766244. Its totient is φ = 8172881336064.

The previous prime is 20432203340209. The next prime is 20432203340321. The reversal of 20432203340240 is 4204330223402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12992881630096 + 7439321710144 = 3604564^2 + 2727512^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×20432203340240² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127701270797 + ... + 127701270956.

Almost surely, 2^{20432203340240} is an apocalyptic number.

20432203340240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20432203340240 is an abundant number, since it is smaller than the sum of its proper divisors (27072669426004).

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

20432203340240 is a wasteful number, since it uses less digits than its factorization.

20432203340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255402541766 (or 255402541760 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 20432203340240 its reverse (4204330223402), we get a palindrome (24636533563642).

The spelling of 20432203340240 in words is "twenty trillion, four hundred thirty-two billion, two hundred three million, three hundred forty thousand, two hundred forty".