20402134135 has 8 divisors (see below), whose sum is σ = 24777532080. Its totient is φ = 16125059904.

The previous prime is 20402134111. The next prime is 20402134183. The reversal of 20402134135 is 53143120402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20402134135 - 2⁷ = 20402134007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24580470 + ... + 24581299.

It is an arithmetic number, because the mean of its divisors is an integer number (3097191510).

Almost surely, 2^20402134135 is an apocalyptic number.

20402134135 is a deficient number, since it is larger than the sum of its proper divisors (4375397945).

20402134135 is an equidigital number, since it uses as much as digits as its factorization.

20402134135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49161857.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20402134135 its reverse (53143120402), we get a palindrome (73545254537).

The spelling of 20402134135 in words is "twenty billion, four hundred two million, one hundred thirty-four thousand, one hundred thirty-five".