20778411402 has 48 divisors (see below), whose sum is σ = 52706227392. Its totient is φ = 5791890240.

The previous prime is 20778411391. The next prime is 20778411403. The reversal of 20778411402 is 20411487702.

20778411402 is a `hidden beast` number, since 207 + 7 + 8 + 41 + 1 + 402 = 666.

It is not an unprimeable number, because it can be changed into a prime (20778411403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2005908 + ... + 2016239.

It is an arithmetic number, because the mean of its divisors is an integer number (1098046404).

Almost surely, 2^20778411402 is an apocalyptic number.

20778411402 is an abundant number, since it is smaller than the sum of its proper divisors (31927815990).

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

20778411402 is a wasteful number, since it uses less digits than its factorization.

20778411402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022203 (or 4022200 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The spelling of 20778411402 in words is "twenty billion, seven hundred seventy-eight million, four hundred eleven thousand, four hundred two".