20001212020005 has 16 divisors (see below), whose sum is σ = 32032044562560. Its totient is φ = 10657277967168.

The previous prime is 20001212019989. The next prime is 20001212020019. The reversal of 20001212020005 is 50002021210002.

It is not a de Polignac number, because 20001212020005 - 2⁴ = 20001212019989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 627177910 + ... + 627209799.

It is an arithmetic number, because the mean of its divisors is an integer number (2002002785160).

Almost surely, 2^{20001212020005} is an apocalyptic number.

It is an amenable number.

20001212020005 is a deficient number, since it is larger than the sum of its proper divisors (12030832542555).

20001212020005 is a wasteful number, since it uses less digits than its factorization.

20001212020005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254388780.

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 20001212020005 its reverse (50002021210002), we get a palindrome (70003233230007).

The spelling of 20001212020005 in words is "twenty trillion, one billion, two hundred twelve million, twenty thousand, five".