20771411067078 has 32 divisors (see below), whose sum is σ = 47486501767680. Its totient is φ = 5933565031680.

The previous prime is 20771411067049. The next prime is 20771411067089. The reversal of 20771411067078 is 87076011417702.

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 20771411067078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46602418 + ... + 47046021.

It is an arithmetic number, because the mean of its divisors is an integer number (1483953180240).

Almost surely, 2^{20771411067078} is an apocalyptic number.

20771411067078 is an abundant number, since it is smaller than the sum of its proper divisors (26715090700602).

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

20771411067078 is a wasteful number, since it uses less digits than its factorization.

20771411067078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93653732.

The product of its (nonzero) digits is 921984, while the sum is 51.

The spelling of 20771411067078 in words is "twenty trillion, seven hundred seventy-one billion, four hundred eleven million, sixty-seven thousand, seventy-eight".