20204022000020 has 24 divisors (see below), whose sum is σ = 42486329513544. Its totient is φ = 8070583406976.

The previous prime is 20204021999983. The next prime is 20204022000023. The reversal of 20204022000020 is 2000022040202.

It can be written as a sum of positive squares in 4 ways, for example, as 3029263668484 + 17174758331536 = 1740478^2 + 4144244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20204021999959 and 20204022000004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204022000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689072039 + ... + 689101358.

It is an arithmetic number, because the mean of its divisors is an integer number (1770263729731).

Almost surely, 2^{20204022000020} is an apocalyptic number.

20204022000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20204022000020 is an abundant number, since it is smaller than the sum of its proper divisors (22282307513524).

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

20204022000020 is a wasteful number, since it uses less digits than its factorization.

20204022000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378174139 (or 1378174137 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20204022000020 its reverse (2000022040202), we get a palindrome (22204044040222).

The spelling of 20204022000020 in words is "twenty trillion, two hundred four billion, twenty-two million, twenty", and thus it is an aban number.