20550435429994 has 4 divisors (see below), whose sum is σ = 30825653144994. Its totient is φ = 10275217714996.

The previous prime is 20550435429973. The next prime is 20550435430013. The reversal of 20550435429994 is 49992453405502.

It is a happy number.

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., 15109585281025 + 5440850148969 = 3887105^2 + 2332563^2 .

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, 5137608857497 + ... + 5137608857500.

Almost surely, 2^{20550435429994} is an apocalyptic number.

20550435429994 is a deficient number, since it is larger than the sum of its proper divisors (10275217715000).

20550435429994 is a wasteful number, since it uses less digits than its factorization.

20550435429994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275217714999.

The product of its (nonzero) digits is 69984000, while the sum is 61.

The spelling of 20550435429994 in words is "twenty trillion, five hundred fifty billion, four hundred thirty-five million, four hundred twenty-nine thousand, nine hundred ninety-four".