20154254100 has 36 divisors (see below), whose sum is σ = 58312976064. Its totient is φ = 5374467680.

The previous prime is 20154254059. The next prime is 20154254111. The reversal of 20154254100 is 145245102.

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 11 ways as a sum of consecutive naturals, for example, 33590124 + ... + 33590723.

Almost surely, 2^20154254100 is an apocalyptic number.

20154254100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154254100 is an abundant number, since it is smaller than the sum of its proper divisors (38158721964).

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

20154254100 is a wasteful number, since it uses less digits than its factorization.

20154254100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67180864 (or 67180857 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 20154254100 its reverse (145245102), we get a palindrome (20299499202).

The spelling of 20154254100 in words is "twenty billion, one hundred fifty-four million, two hundred fifty-four thousand, one hundred".