20135907936 has 120 divisors (see below), whose sum is σ = 60819953040. Its totient is φ = 6530533632.

The previous prime is 20135907919. The next prime is 20135907943. The reversal of 20135907936 is 63970953102.

20135907936 is a `hidden beast` number, since 20 + 1 + 3 + 590 + 7 + 9 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20135907891 and 20135907900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9076 + ... + 200883.

It is an arithmetic number, because the mean of its divisors is an integer number (506832942).

Almost surely, 2^20135907936 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 20135907936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30409976520).

20135907936 is an abundant number, since it is smaller than the sum of its proper divisors (40684045104).

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

20135907936 is a wasteful number, since it uses less digits than its factorization.

20135907936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210018 (or 210001 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 20135907936 in words is "twenty billion, one hundred thirty-five million, nine hundred seven thousand, nine hundred thirty-six".