20400445326312 has 96 divisors (see below), whose sum is σ = 56204276544000. Its totient is φ = 6682915607040.

The previous prime is 20400445326277. The next prime is 20400445326341. The reversal of 20400445326312 is 21362354400402.

20400445326312 is a `hidden beast` number, since 20 + 4 + 0 + 0 + 44 + 532 + 63 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13696864 + ... + 15113072.

It is an arithmetic number, because the mean of its divisors is an integer number (585461214000).

Almost surely, 2^{20400445326312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20400445326312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28102138272000).

20400445326312 is an abundant number, since it is smaller than the sum of its proper divisors (35803831217688).

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

20400445326312 is a wasteful number, since it uses less digits than its factorization.

20400445326312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419671 (or 1419664 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 20400445326312 its reverse (21362354400402), we get a palindrome (41762799726714).

The spelling of 20400445326312 in words is "twenty trillion, four hundred billion, four hundred forty-five million, three hundred twenty-six thousand, three hundred twelve".