20003555436225 has 24 divisors (see below), whose sum is σ = 34510481729472. Its totient is φ = 10204712337600.

The previous prime is 20003555436199. The next prime is 20003555436253. The reversal of 20003555436225 is 52263455530002.

It is not a de Polignac number, because 20003555436225 - 2¹⁹ = 20003554911937 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 5798130286 + ... + 5798133735.

It is an arithmetic number, because the mean of its divisors is an integer number (1437936738728).

Almost surely, 2^{20003555436225} is an apocalyptic number.

20003555436225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20003555436225 is a deficient number, since it is larger than the sum of its proper divisors (14506926293247).

20003555436225 is a wasteful number, since it uses less digits than its factorization.

20003555436225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11596264057 (or 11596264052 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 42.

The spelling of 20003555436225 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred thirty-six thousand, two hundred twenty-five".