20043505525 has 24 divisors (see below), whose sum is σ = 25056531200. Its totient is φ = 15904641600.

The previous prime is 20043505519. The next prime is 20043505543. The reversal of 20043505525 is 52550534002.

It is a happy number.

It is not a de Polignac number, because 20043505525 - 2¹⁷ = 20043374453 is a prime.

It is a super-2 number, since 2×20043505525² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 1545016 + ... + 1557934.

Almost surely, 2^20043505525 is an apocalyptic number.

20043505525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20043505525 is a deficient number, since it is larger than the sum of its proper divisors (5013025675).

20043505525 is a wasteful number, since it uses less digits than its factorization.

20043505525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13429 (or 13424 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 31.

The spelling of 20043505525 in words is "twenty billion, forty-three million, five hundred five thousand, five hundred twenty-five".