20902468609 has 48 divisors (see below), whose sum is σ = 25486442496. Its totient is φ = 16964640000.

The previous prime is 20902468607. The next prime is 20902468663. The reversal of 20902468609 is 90686420902.

It is not a de Polignac number, because 20902468609 - 2¹ = 20902468607 is a prime.

It is a super-3 number, since 3×20902468609³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20902468607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9284734 + ... + 9286984.

It is an arithmetic number, because the mean of its divisors is an integer number (530967552).

Almost surely, 2^20902468609 is an apocalyptic number.

It is an amenable number.

20902468609 is a deficient number, since it is larger than the sum of its proper divisors (4583973887).

20902468609 is a wasteful number, since it uses less digits than its factorization.

20902468609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446 (or 2429 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 20902468609 in words is "twenty billion, nine hundred two million, four hundred sixty-eight thousand, six hundred nine".