20523523212 has 36 divisors (see below), whose sum is σ = 52503960600. Its totient is φ = 6758749632.

The previous prime is 20523523121. The next prime is 20523523291. The reversal of 20523523212 is 21232532502.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3431337 + ... + 3437312.

It is an arithmetic number, because the mean of its divisors is an integer number (1458443350).

Almost surely, 2^20523523212 is an apocalyptic number.

It is an amenable number.

20523523212 is an abundant number, since it is smaller than the sum of its proper divisors (31980437388).

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

20523523212 is a wasteful number, since it uses less digits than its factorization.

20523523212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868742 (or 6868737 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 20523523212 in words is "twenty billion, five hundred twenty-three million, five hundred twenty-three thousand, two hundred twelve".