20204145565320 has 64 divisors (see below), whose sum is σ = 61902063025920. Its totient is φ = 5273138699264.

The previous prime is 20204145565319. The next prime is 20204145565393. The reversal of 20204145565320 is 2356554140202.

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 15 ways as a sum of consecutive naturals, for example, 1791142017 + ... + 1791153296.

It is an arithmetic number, because the mean of its divisors is an integer number (967219734780).

Almost surely, 2^{20204145565320} is an apocalyptic number.

20204145565320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20204145565320 is an abundant number, since it is smaller than the sum of its proper divisors (41697917460600).

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

20204145565320 is a wasteful number, since it uses less digits than its factorization.

20204145565320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582295374 (or 3582295370 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 20204145565320 in words is "twenty trillion, two hundred four billion, one hundred forty-five million, five hundred sixty-five thousand, three hundred twenty".