20106443649 has 8 divisors (see below), whose sum is σ = 26907517312. Its totient is φ = 13354832880.

The previous prime is 20106443629. The next prime is 20106443653. The reversal of 20106443649 is 94634460102.

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

It is not a de Polignac number, because 20106443649 - 2⁷ = 20106443521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20106443629) 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, 12364774 + ... + 12366399.

It is an arithmetic number, because the mean of its divisors is an integer number (3363439664).

Almost surely, 2^20106443649 is an apocalyptic number.

It is an amenable number.

20106443649 is a deficient number, since it is larger than the sum of its proper divisors (6801073663).

20106443649 is a wasteful number, since it uses less digits than its factorization.

20106443649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24731447.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 20106443649 in words is "twenty billion, one hundred six million, four hundred forty-three thousand, six hundred forty-nine".