20405770122 has 16 divisors (see below), whose sum is σ = 40869110880. Its totient is φ = 6792328272.

The previous prime is 20405770109. The next prime is 20405770127. The reversal of 20405770122 is 22107750402.

It is a self number, because there is not a number n which added to its sum of digits gives 20405770122.

It is not an unprimeable number, because it can be changed into a prime (20405770127) 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, 2394168 + ... + 2402675.

It is an arithmetic number, because the mean of its divisors is an integer number (2554319430).

Almost surely, 2^20405770122 is an apocalyptic number.

20405770122 is an abundant number, since it is smaller than the sum of its proper divisors (20463340758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20405770122 is a wasteful number, since it uses less digits than its factorization.

20405770122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797557.

The product of its (nonzero) digits is 7840, while the sum is 30.

The spelling of 20405770122 in words is "twenty billion, four hundred five million, seven hundred seventy thousand, one hundred twenty-two".