20523514512 has 40 divisors (see below), whose sum is σ = 53029579104. Its totient is φ = 6839816704.

The previous prime is 20523514507. The next prime is 20523514541. The reversal of 20523514512 is 21541532502.

It is a self number, because there is not a number n which added to its sum of digits gives 20523514512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219223 + ... + 298505.

Almost surely, 2^20523514512 is an apocalyptic number.

It is an amenable number.

20523514512 is an abundant number, since it is smaller than the sum of its proper divisors (32506064592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20523514512 is a wasteful number, since it uses less digits than its factorization.

20523514512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84687 (or 84681 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20523514512 in words is "twenty billion, five hundred twenty-three million, five hundred fourteen thousand, five hundred twelve".