20292042947509 has 4 divisors (see below), whose sum is σ = 20292234905740. Its totient is φ = 20291850989280.

The previous prime is 20292042947503. The next prime is 20292042947557. The reversal of 20292042947509 is 90574924029202.

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 2 ways, for example, as 17354281227409 + 2937761720100 = 4165847^2 + 1713990^2 .

It is a cyclic number.

It is not a de Polignac number, because 20292042947509 - 2¹³ = 20292042939317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20292042947509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20292042947503) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 95820462 + ... + 96031999.

It is an arithmetic number, because the mean of its divisors is an integer number (5073058726435).

Almost surely, 2^{20292042947509} is an apocalyptic number.

It is an amenable number.

20292042947509 is a deficient number, since it is larger than the sum of its proper divisors (191958231).

20292042947509 is a wasteful number, since it uses less digits than its factorization.

20292042947509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191958230.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 20292042947509 in words is "twenty trillion, two hundred ninety-two billion, forty-two million, nine hundred forty-seven thousand, five hundred nine".