20402002402240 has 56 divisors (see below), whose sum is σ = 48753937229040. Its totient is φ = 8131964172288.

The previous prime is 20402002402211. The next prime is 20402002402241. The reversal of 20402002402240 is 4220420020402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402002402241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112553005 + ... + 112734124.

Almost surely, 2^{20402002402240} is an apocalyptic number.

20402002402240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402002402240 is an abundant number, since it is smaller than the sum of its proper divisors (28351934826800).

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

20402002402240 is a wasteful number, since it uses less digits than its factorization.

20402002402240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225287429 (or 225287419 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20402002402240 its reverse (4220420020402), we get a palindrome (24622422422642).

The spelling of 20402002402240 in words is "twenty trillion, four hundred two billion, two million, four hundred two thousand, two hundred forty".