20502455043220 has 12 divisors (see below), whose sum is σ = 43055155590804. Its totient is φ = 8200982017280.

The previous prime is 20502455043211. The next prime is 20502455043277. The reversal of 20502455043220 is 2234055420502.

It can be written as a sum of positive squares in 2 ways, for example, as 13117985759376 + 7384469283844 = 3621876^2 + 2717438^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512561376061 + ... + 512561376100.

It is an arithmetic number, because the mean of its divisors is an integer number (3587929632567).

Almost surely, 2^{20502455043220} is an apocalyptic number.

20502455043220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20502455043220 is an abundant number, since it is smaller than the sum of its proper divisors (22552700547584).

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

20502455043220 is a wasteful number, since it uses less digits than its factorization.

20502455043220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025122752170 (or 1025122752168 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

The spelling of 20502455043220 in words is "twenty trillion, five hundred two billion, four hundred fifty-five million, forty-three thousand, two hundred twenty".