20456654425 has 6 divisors (see below), whose sum is σ = 25366251518. Its totient is φ = 16365323520.

The previous prime is 20456654423. The next prime is 20456654443. The reversal of 20456654425 is 52445665402.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3936256 + 20452718169 = 1984^2 + 143013^2 .

It is not a de Polignac number, because 20456654425 - 2¹ = 20456654423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456654423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 409133064 + ... + 409133113.

Almost surely, 2^20456654425 is an apocalyptic number.

20456654425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20456654425 is a deficient number, since it is larger than the sum of its proper divisors (4909597093).

20456654425 is an equidigital number, since it uses as much as digits as its factorization.

20456654425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818266187 (or 818266182 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 20456654425 in words is "twenty billion, four hundred fifty-six million, six hundred fifty-four thousand, four hundred twenty-five".