20135332453 has 8 divisors (see below), whose sum is σ = 20258304120. Its totient is φ = 20012717760.

The previous prime is 20135332447. The next prime is 20135332573. The reversal of 20135332453 is 35423353102.

It can be written as a sum of positive squares in 4 ways, for example, as 3718804324 + 16416528129 = 60982^2 + 128127^2 .

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 20135332453 - 2⁹ = 20135331941 is a prime.

It is a super-2 number, since 2×20135332453² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135332433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24351 + ... + 202147.

It is an arithmetic number, because the mean of its divisors is an integer number (2532288015).

Almost surely, 2^20135332453 is an apocalyptic number.

It is an amenable number.

20135332453 is a deficient number, since it is larger than the sum of its proper divisors (122971667).

20135332453 is a wasteful number, since it uses less digits than its factorization.

20135332453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178487.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 20135332453 its reverse (35423353102), we get a palindrome (55558685555).

The spelling of 20135332453 in words is "twenty billion, one hundred thirty-five million, three hundred thirty-two thousand, four hundred fifty-three".