20447274402 has 24 divisors (see below), whose sum is σ = 44327428236. Its totient is φ = 6811911936.

The previous prime is 20447274389. The next prime is 20447274409.

20447274402 is a `hidden beast` number, since 204 + 4 + 7 + 2 + 7 + 440 + 2 = 666.

20447274402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 20252420721 + 194853681 = 142311^2 + 13959^2 .

It is not an unprimeable number, because it can be changed into a prime (20447274409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287643 + ... + 351614.

Almost surely, 2^20447274402 is an apocalyptic number.

20447274402 is an abundant number, since it is smaller than the sum of its proper divisors (23880153834).

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

20447274402 is a wasteful number, since it uses less digits than its factorization.

20447274402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641042 (or 641039 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 36.

It can be divided in two parts, 20447 and 274402, that added together give a square (294849 = 543²).

The spelling of 20447274402 in words is "twenty billion, four hundred forty-seven million, two hundred seventy-four thousand, four hundred two".