20438488525 has 24 divisors (see below), whose sum is σ = 31192281344. Its totient is φ = 12936888000.

The previous prime is 20438488513. The next prime is 20438488559. The reversal of 20438488525 is 52588483402.

It is a happy number.

It is not a de Polignac number, because 20438488525 - 2¹⁹ = 20437964237 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 4489701 + ... + 4494250.

Almost surely, 2^20438488525 is an apocalyptic number.

20438488525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20438488525 is a deficient number, since it is larger than the sum of its proper divisors (10753792819).

20438488525 is a wasteful number, since it uses less digits than its factorization.

20438488525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8983981 (or 8983976 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 49.

The spelling of 20438488525 in words is "twenty billion, four hundred thirty-eight million, four hundred eighty-eight thousand, five hundred twenty-five".