20015533400012 has 24 divisors (see below), whose sum is σ = 35424546781680. Its totient is φ = 9894258443520.

The previous prime is 20015533399913. The next prime is 20015533400039. The reversal of 20015533400012 is 21000433551002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313187 + ... + 6334757.

It is an arithmetic number, because the mean of its divisors is an integer number (1476022782570).

Almost surely, 2^{20015533400012} is an apocalyptic number.

It is an amenable number.

20015533400012 is a deficient number, since it is larger than the sum of its proper divisors (15409013381668).

20015533400012 is a wasteful number, since it uses less digits than its factorization.

20015533400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6031001 (or 6030999 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20015533400012 its reverse (21000433551002), we get a palindrome (41015966951014).

The spelling of 20015533400012 in words is "twenty trillion, fifteen billion, five hundred thirty-three million, four hundred thousand, twelve".