20342111233240 has 64 divisors (see below), whose sum is σ = 46191666411360. Its totient is φ = 8061889812480.

The previous prime is 20342111233211. The next prime is 20342111233321. The reversal of 20342111233240 is 4233211124302.

It is a junction number, because it is equal to n+sod(n) for n = 20342111233199 and 20342111233208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11568367 + ... + 13210273.

Almost surely, 2^{20342111233240} is an apocalyptic number.

20342111233240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20342111233240 is an abundant number, since it is smaller than the sum of its proper divisors (25849555178120).

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

20342111233240 is a wasteful number, since it uses less digits than its factorization.

20342111233240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644772 (or 1644768 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20342111233240 its reverse (4233211124302), we get a palindrome (24575322357542).

The spelling of 20342111233240 in words is "twenty trillion, three hundred forty-two billion, one hundred eleven million, two hundred thirty-three thousand, two hundred forty".