2620020555421 has 4 divisors (see below), whose sum is σ = 2620380307392. Its totient is φ = 2619660803452.

The previous prime is 2620020555407. The next prime is 2620020555443. The reversal of 2620020555421 is 1245550200262.

2620020555421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2620020555421 - 2¹⁵ = 2620020522653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620020555121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179865061 + ... + 179879626.

It is an arithmetic number, because the mean of its divisors is an integer number (655095076848).

Almost surely, 2^{2620020555421} is an apocalyptic number.

It is an amenable number.

2620020555421 is a deficient number, since it is larger than the sum of its proper divisors (359751971).

2620020555421 is an equidigital number, since it uses as much as digits as its factorization.

2620020555421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359751970.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 2620020555421 its reverse (1245550200262), we get a palindrome (3865570755683).

The spelling of 2620020555421 in words is "two trillion, six hundred twenty billion, twenty million, five hundred fifty-five thousand, four hundred twenty-one".