20146869651 has 8 divisors (see below), whose sum is σ = 27729025024. Its totient is φ = 12997980360.

The previous prime is 20146869637. The next prime is 20146869671. The reversal of 20146869651 is 15696864102.

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

It is not a de Polignac number, because 20146869651 - 2¹⁰ = 20146868627 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 20146869651.

It is not an unprimeable number, because it can be changed into a prime (20146869671) 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 7 ways as a sum of consecutive naturals, for example, 108316411 + ... + 108316596.

It is an arithmetic number, because the mean of its divisors is an integer number (3466128128).

Almost surely, 2^20146869651 is an apocalyptic number.

20146869651 is a deficient number, since it is larger than the sum of its proper divisors (7582155373).

20146869651 is a wasteful number, since it uses less digits than its factorization.

20146869651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216633041.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 20146869651 in words is "twenty billion, one hundred forty-six million, eight hundred sixty-nine thousand, six hundred fifty-one".