20135405034 has 64 divisors (see below), whose sum is σ = 45886176000. Its totient is φ = 6542807040.

The previous prime is 20135405023. The next prime is 20135405053. The reversal of 20135405034 is 43050453102.

20135405034 is a `hidden beast` number, since 20 + 135 + 4 + 0 + 503 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20135404989 and 20135405007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311722 + ... + 370730.

It is an arithmetic number, because the mean of its divisors is an integer number (716971500).

Almost surely, 2^20135405034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20135405034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22943088000).

20135405034 is an abundant number, since it is smaller than the sum of its proper divisors (25750770966).

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

20135405034 is a wasteful number, since it uses less digits than its factorization.

20135405034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59180 (or 59174 counting only the distinct ones).

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

Adding to 20135405034 its reverse (43050453102), we get a palindrome (63185858136).

The spelling of 20135405034 in words is "twenty billion, one hundred thirty-five million, four hundred five thousand, thirty-four".