20245121003500 has 24 divisors (see below), whose sum is σ = 44215344272736. Its totient is φ = 8098048401200.

The previous prime is 20245121003491. The next prime is 20245121003531. The reversal of 20245121003500 is 530012154202.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20245120504 + ... + 20245121503.

It is an arithmetic number, because the mean of its divisors is an integer number (1842306011364).

Almost surely, 2^{20245121003500} is an apocalyptic number.

20245121003500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20245121003500 is an abundant number, since it is smaller than the sum of its proper divisors (23970223269236).

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

20245121003500 is a wasteful number, since it uses less digits than its factorization.

20245121003500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40490242026 (or 40490242014 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20245121003500 its reverse (530012154202), we get a palindrome (20775133157702).

The spelling of 20245121003500 in words is "twenty trillion, two hundred forty-five billion, one hundred twenty-one million, three thousand, five hundred".