20489943099 has 8 divisors (see below), whose sum is σ = 27462961152. Its totient is φ = 13588443560.

The previous prime is 20489943079. The next prime is 20489943109. The reversal of 20489943099 is 99034998402.

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 20489943099 - 2¹⁶ = 20489877563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20489943079) 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, 17878959 + ... + 17880104.

It is an arithmetic number, because the mean of its divisors is an integer number (3432870144).

Almost surely, 2^20489943099 is an apocalyptic number.

20489943099 is a deficient number, since it is larger than the sum of its proper divisors (6973018053).

20489943099 is a wasteful number, since it uses less digits than its factorization.

20489943099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35759257.

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 20489943099 in words is "twenty billion, four hundred eighty-nine million, nine hundred forty-three thousand, ninety-nine".