20434501605146 has 4 divisors (see below), whose sum is σ = 30651752407722. Its totient is φ = 10217250802572.

The previous prime is 20434501605113. The next prime is 20434501605181. The reversal of 20434501605146 is 64150610543402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19645629010921 + 788872594225 = 4432339^2 + 888185^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108625401285 + ... + 5108625401288.

Almost surely, 2^{20434501605146} is an apocalyptic number.

20434501605146 is a deficient number, since it is larger than the sum of its proper divisors (10217250802576).

20434501605146 is a wasteful number, since it uses less digits than its factorization.

20434501605146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217250802575.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 20434501605146 in words is "twenty trillion, four hundred thirty-four billion, five hundred one million, six hundred five thousand, one hundred forty-six".