20053521612 has 72 divisors (see below), whose sum is σ = 52958671584. Its totient is φ = 6386155776.

The previous prime is 20053521611. The next prime is 20053521617. The reversal of 20053521612 is 21612535002.

It is a happy number.

20053521612 is a `hidden beast` number, since 20 + 0 + 5 + 3 + 5 + 21 + 612 = 666.

It is not an unprimeable number, because it can be changed into a prime (20053521611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 692088 + ... + 720480.

Almost surely, 2^20053521612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20053521612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26479335792).

20053521612 is an abundant number, since it is smaller than the sum of its proper divisors (32905149972).

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

20053521612 is a wasteful number, since it uses less digits than its factorization.

20053521612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29279 (or 29274 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20053521612 in words is "twenty billion, fifty-three million, five hundred twenty-one thousand, six hundred twelve".