20601554425 has 6 divisors (see below), whose sum is σ = 25545927518. Its totient is φ = 16481243520.

The previous prime is 20601554419. The next prime is 20601554437. The reversal of 20601554425 is 52445510602.

It can be written as a sum of positive squares in 3 ways, for example, as 21930489 + 20579623936 = 4683^2 + 143456^2 .

It is not a de Polignac number, because 20601554425 - 2⁹ = 20601553913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412031064 + ... + 412031113.

Almost surely, 2^20601554425 is an apocalyptic number.

20601554425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20601554425 is a deficient number, since it is larger than the sum of its proper divisors (4944373093).

20601554425 is an equidigital number, since it uses as much as digits as its factorization.

20601554425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824062187 (or 824062182 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 20601554425 in words is "twenty billion, six hundred one million, five hundred fifty-four thousand, four hundred twenty-five".