20001201210036 has 36 divisors (see below), whose sum is σ = 50746542128100. Its totient is φ = 6642282430848.

The previous prime is 20001201209959. The next prime is 20001201210037. The reversal of 20001201210036 is 63001210210002.

It can be written as a sum of positive squares in 2 ways, for example, as 6338611875600 + 13662589334436 = 2517660^2 + 3696294^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001201210037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1032683481 + ... + 1032702848.

It is an arithmetic number, because the mean of its divisors is an integer number (1409626170225).

Almost surely, 2^{20001201210036} is an apocalyptic number.

It is an amenable number.

20001201210036 is an abundant number, since it is smaller than the sum of its proper divisors (30745340918064).

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

20001201210036 is a wasteful number, since it uses less digits than its factorization.

20001201210036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065386608 (or 2065386603 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20001201210036 its reverse (63001210210002), we get a palindrome (83002411420038).

The spelling of 20001201210036 in words is "twenty trillion, one billion, two hundred one million, two hundred ten thousand, thirty-six".