20154403312 has 40 divisors (see below), whose sum is σ = 41425513776. Its totient is φ = 9466223616.

The previous prime is 20154403309. The next prime is 20154403327. The reversal of 20154403312 is 21330445102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 71418 + ... + 213094.

Almost surely, 2^20154403312 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 20154403312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20712756888).

20154403312 is an abundant number, since it is smaller than the sum of its proper divisors (21271110464).

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

20154403312 is a wasteful number, since it uses less digits than its factorization.

20154403312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142225 (or 142219 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20154403312 its reverse (21330445102), we get a palindrome (41484848414).

The spelling of 20154403312 in words is "twenty billion, one hundred fifty-four million, four hundred three thousand, three hundred twelve".