20779538201422 has 128 divisors (see below), whose sum is σ = 44063739740160. Its totient is φ = 7078000268160.

The previous prime is 20779538201369. The next prime is 20779538201501. The reversal of 20779538201422 is 22410283597702.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20779538201422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150827893 + ... + 150965599.

It is an arithmetic number, because the mean of its divisors is an integer number (344247966720).

Almost surely, 2^{20779538201422} is an apocalyptic number.

20779538201422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20779538201422 is an abundant number, since it is smaller than the sum of its proper divisors (23284201538738).

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

20779538201422 is a wasteful number, since it uses less digits than its factorization.

20779538201422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141726.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 20779538201422 in words is "twenty trillion, seven hundred seventy-nine billion, five hundred thirty-eight million, two hundred one thousand, four hundred twenty-two".