20004005525 has 24 divisors (see below), whose sum is σ = 28358423040. Its totient is φ = 13712247360.

The previous prime is 20004005507. The next prime is 20004005597. The reversal of 20004005525 is 52550040002.

It is not a de Polignac number, because 20004005525 - 2³⁰ = 18930263701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20004005525.

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, 525692 + ... + 562458.

It is an arithmetic number, because the mean of its divisors is an integer number (1181600960).

Almost surely, 2^20004005525 is an apocalyptic number.

20004005525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20004005525 is a deficient number, since it is larger than the sum of its proper divisors (8354417515).

20004005525 is a wasteful number, since it uses less digits than its factorization.

20004005525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39893 (or 39888 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

Adding to 20004005525 its reverse (52550040002), we get a palindrome (72554045527).

The spelling of 20004005525 in words is "twenty billion, four million, five thousand, five hundred twenty-five".