20849620870 has 16 divisors (see below), whose sum is σ = 40416188400. Its totient is φ = 7698321504.

The previous prime is 20849620849. The next prime is 20849620889. The reversal of 20849620870 is 7802694802.

It is a self number, because there is not a number n which added to its sum of digits gives 20849620870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80190720 + ... + 80190979.

It is an arithmetic number, because the mean of its divisors is an integer number (2526011775).

Almost surely, 2^20849620870 is an apocalyptic number.

20849620870 is a deficient number, since it is larger than the sum of its proper divisors (19566567530).

20849620870 is a wasteful number, since it uses less digits than its factorization.

20849620870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160381719.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 20849620870 in words is "twenty billion, eight hundred forty-nine million, six hundred twenty thousand, eight hundred seventy".