20853070909 has 12 divisors (see below), whose sum is σ = 23008331808. Its totient is φ = 18885227240.

The previous prime is 20853070879. The next prime is 20853070913. The reversal of 20853070909 is 90907035802.

It is a happy number.

It is not a de Polignac number, because 20853070909 - 2⁵ = 20853070877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850070909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295819 + ... + 359464.

It is an arithmetic number, because the mean of its divisors is an integer number (1917360984).

Almost surely, 2^20853070909 is an apocalyptic number.

It is an amenable number.

20853070909 is a deficient number, since it is larger than the sum of its proper divisors (2155260899).

20853070909 is a wasteful number, since it uses less digits than its factorization.

20853070909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655568 (or 655557 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 20853070909 in words is "twenty billion, eight hundred fifty-three million, seventy thousand, nine hundred nine".