20523135004 has 12 divisors (see below), whose sum is σ = 35920443328. Its totient is φ = 10260151200.

The previous prime is 20523134963. The next prime is 20523135011. The reversal of 20523135004 is 40053132502.

It is a self number, because there is not a number n which added to its sum of digits gives 20523135004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321132 + ... + 379699.

Almost surely, 2^20523135004 is an apocalyptic number.

It is an amenable number.

20523135004 is a deficient number, since it is larger than the sum of its proper divisors (15397308324).

20523135004 is a wasteful number, since it uses less digits than its factorization.

20523135004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708156 (or 708154 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20523135004 its reverse (40053132502), we get a palindrome (60576267506).

The spelling of 20523135004 in words is "twenty billion, five hundred twenty-three million, one hundred thirty-five thousand, four".