20146869653 has 4 divisors (see below), whose sum is σ = 20488342080. Its totient is φ = 19805397228.

The previous prime is 20146869637. The next prime is 20146869671. The reversal of 20146869653 is 35696864102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20146869653 - 2⁴ = 20146869637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146862653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170736125 + ... + 170736242.

It is an arithmetic number, because the mean of its divisors is an integer number (5122085520).

Almost surely, 2^20146869653 is an apocalyptic number.

It is an amenable number.

20146869653 is a deficient number, since it is larger than the sum of its proper divisors (341472427).

20146869653 is an equidigital number, since it uses as much as digits as its factorization.

20146869653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341472426.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 20146869653 in words is "twenty billion, one hundred forty-six million, eight hundred sixty-nine thousand, six hundred fifty-three".