20840220850 has 12 divisors (see below), whose sum is σ = 38762810874. Its totient is φ = 8336088320.

The previous prime is 20840220767. The next prime is 20840220871. The reversal of 20840220850 is 5802204802.

It can be written as a sum of positive squares in 3 ways, for example, as 14474255481 + 6365965369 = 120309^2 + 79787^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208402159 + ... + 208402258.

Almost surely, 2^20840220850 is an apocalyptic number.

20840220850 is a deficient number, since it is larger than the sum of its proper divisors (17922590024).

20840220850 is a wasteful number, since it uses less digits than its factorization.

20840220850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416804429 (or 416804424 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The spelling of 20840220850 in words is "twenty billion, eight hundred forty million, two hundred twenty thousand, eight hundred fifty".