20154430225 has 24 divisors (see below), whose sum is σ = 26148272832. Its totient is φ = 15381009600.

The previous prime is 20154430201. The next prime is 20154430243. The reversal of 20154430225 is 52203445102.

It is not a de Polignac number, because 20154430225 - 2²⁷ = 20020212497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20154430193 and 20154430202.

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, 167490 + ... + 261460.

It is an arithmetic number, because the mean of its divisors is an integer number (1089511368).

Almost surely, 2^20154430225 is an apocalyptic number.

20154430225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20154430225 is a deficient number, since it is larger than the sum of its proper divisors (5993842607).

20154430225 is a wasteful number, since it uses less digits than its factorization.

20154430225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94377 (or 94372 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20154430225 its reverse (52203445102), we get a palindrome (72357875327).

The spelling of 20154430225 in words is "twenty billion, one hundred fifty-four million, four hundred thirty thousand, two hundred twenty-five".