20404535134402 has 8 divisors (see below), whose sum is σ = 30607989043212. Its totient is φ = 10201872120000.

The previous prime is 20404535134393. The next prime is 20404535134429. The reversal of 20404535134402 is 20443153540402.

It can be written as a sum of positive squares in 2 ways, for example, as 17706666469041 + 2697868665361 = 4207929^2 + 1642519^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197659099 + ... + 197762302.

Almost surely, 2^{20404535134402} is an apocalyptic number.

20404535134402 is a deficient number, since it is larger than the sum of its proper divisors (10203453908810).

20404535134402 is a wasteful number, since it uses less digits than its factorization.

20404535134402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395447204.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 20404535134402 its reverse (20443153540402), we get a palindrome (40847688674804).

The spelling of 20404535134402 in words is "twenty trillion, four hundred four billion, five hundred thirty-five million, one hundred thirty-four thousand, four hundred two".