20154312064 has 64 divisors (see below), whose sum is σ = 40467606480. Its totient is φ = 9998080000.

The previous prime is 20154312053. The next prime is 20154312103. The reversal of 20154312064 is 46021345102.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9412434 + ... + 9414574.

Almost surely, 2^20154312064 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 20154312064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20233803240).

20154312064 is an abundant number, since it is smaller than the sum of its proper divisors (20313294416).

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

20154312064 is a wasteful number, since it uses less digits than its factorization.

20154312064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20154312064 its reverse (46021345102), we get a palindrome (66175657166).

The spelling of 20154312064 in words is "twenty billion, one hundred fifty-four million, three hundred twelve thousand, sixty-four".