20535021108 has 72 divisors (see below), whose sum is σ = 59337824000. Its totient is φ = 5865721920.

The previous prime is 20535021097. The next prime is 20535021109. The reversal of 20535021108 is 80112053502.

It is a happy number.

20535021108 is a `hidden beast` number, since 2 + 0 + 53 + 502 + 1 + 108 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535021109) 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, 1459893 + ... + 1473891.

Almost surely, 2^20535021108 is an apocalyptic number.

20535021108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20535021108 is an abundant number, since it is smaller than the sum of its proper divisors (38802802892).

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

20535021108 is a wasteful number, since it uses less digits than its factorization.

20535021108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19837 (or 19832 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 20535021108 in words is "twenty billion, five hundred thirty-five million, twenty-one thousand, one hundred eight".