20489290299 has 12 divisors (see below), whose sum is σ = 30154050576. Its totient is φ = 13401799632.

The previous prime is 20489290259. The next prime is 20489290303. The reversal of 20489290299 is 99209298402.

20489290299 is a `hidden beast` number, since 20 + 48 + 9 + 290 + 299 = 666.

It is not a de Polignac number, because 20489290299 - 2¹¹ = 20489288251 is a prime.

It is a super-2 number, since 2×20489290299² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20489290219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21476767 + ... + 21477720.

It is an arithmetic number, because the mean of its divisors is an integer number (2512837548).

Almost surely, 2^20489290299 is an apocalyptic number.

20489290299 is a deficient number, since it is larger than the sum of its proper divisors (9664760277).

20489290299 is a wasteful number, since it uses less digits than its factorization.

20489290299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42954546 (or 42954543 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 20489290299 in words is "twenty billion, four hundred eighty-nine million, two hundred ninety thousand, two hundred ninety-nine".