20437946404 has 6 divisors (see below), whose sum is σ = 35766406214. Its totient is φ = 10218973200.

The previous prime is 20437946401. The next prime is 20437946413. The reversal of 20437946404 is 40464973402.

It can be written as a sum of positive squares in only one way, i.e., 18777220900 + 1660725504 = 137030^2 + 40752^2 .

It is not an unprimeable number, because it can be changed into a prime (20437946401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2554743297 + ... + 2554743304.

Almost surely, 2^20437946404 is an apocalyptic number.

It is an amenable number.

20437946404 is a deficient number, since it is larger than the sum of its proper divisors (15328459810).

20437946404 is a wasteful number, since it uses less digits than its factorization.

20437946404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109486605 (or 5109486603 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 20437946404 in words is "twenty billion, four hundred thirty-seven million, nine hundred forty-six thousand, four hundred four".