20837474689 has 8 divisors (see below), whose sum is σ = 21134977920. Its totient is φ = 20540083200.

The previous prime is 20837474687. The next prime is 20837474701. The reversal of 20837474689 is 98647473802.

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

It is a cyclic number.

It is not a de Polignac number, because 20837474689 - 2¹ = 20837474687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20837474687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392449 + ... + 442369.

It is an arithmetic number, because the mean of its divisors is an integer number (2641872240).

Almost surely, 2^20837474689 is an apocalyptic number.

It is an amenable number.

20837474689 is a deficient number, since it is larger than the sum of its proper divisors (297503231).

20837474689 is an equidigital number, since it uses as much as digits as its factorization.

20837474689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55871.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 20837474689 in words is "twenty billion, eight hundred thirty-seven million, four hundred seventy-four thousand, six hundred eighty-nine".