20401107007512 has 128 divisors (see below), whose sum is σ = 63621221437440. Its totient is φ = 5296209214080.

The previous prime is 20401107007487. The next prime is 20401107007517. The reversal of 20401107007512 is 21570070110402.

It is a self number, because there is not a number n which added to its sum of digits gives 20401107007512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401107007517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629653 + ... + 6418619.

It is an arithmetic number, because the mean of its divisors is an integer number (497040792480).

Almost surely, 2^{20401107007512} is an apocalyptic number.

20401107007512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20401107007512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31810610718720).

20401107007512 is an abundant number, since it is smaller than the sum of its proper divisors (43220114429928).

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

20401107007512 is a wasteful number, since it uses less digits than its factorization.

20401107007512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790901 (or 5790897 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

Adding to 20401107007512 its reverse (21570070110402), we get a palindrome (41971177117914).

The spelling of 20401107007512 in words is "twenty trillion, four hundred one billion, one hundred seven million, seven thousand, five hundred twelve".