2420203555440 has 800 divisors, whose sum is σ = 9295575759360. Its totient is φ = 578721024000.

The previous prime is 2420203555379. The next prime is 2420203555477. The reversal of 2420203555440 is 445553020242.

2420203555440 is a `hidden beast` number, since 2 + 4 + 2 + 0 + 203 + 5 + 5 + 5 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2420203555395 and 2420203555404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2728526677 + ... + 2728527563.

Almost surely, 2^{2420203555440} is an apocalyptic number.

2420203555440 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 2420203555440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4647787879680).

2420203555440 is an abundant number, since it is smaller than the sum of its proper divisors (6875372203920).

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

2420203555440 is a wasteful number, since it uses less digits than its factorization.

2420203555440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 36.

Adding to 2420203555440 its reverse (445553020242), we get a palindrome (2865756575682).

The spelling of 2420203555440 in words is "two trillion, four hundred twenty billion, two hundred three million, five hundred fifty-five thousand, four hundred forty".