620420022450 has 90 divisors (see below), whose sum is σ = 1723987811271. Its totient is φ = 165431972160.

The previous prime is 620420022421. The next prime is 620420022451. The reversal of 620420022450 is 54220024026.

It is a happy number.

620420022450 is a `hidden beast` number, since 6 + 2 + 0 + 4 + 200 + 2 + 2 + 450 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 25224745329 + 595195277121 = 158823^2 + 771489^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=556965.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (620420022451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 50120662 + ... + 50133038.

Almost surely, 2^620420022450 is an apocalyptic number.

620420022450 is an abundant number, since it is smaller than the sum of its proper divisors (1103567788821).

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

620420022450 is an frugal number, since it uses more digits than its factorization.

620420022450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24778 (or 12387 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 620420022450 its reverse (54220024026), we get a palindrome (674640046476).

The spelling of 620420022450 in words is "six hundred twenty billion, four hundred twenty million, twenty-two thousand, four hundred fifty".