20511014404 has 24 divisors (see below), whose sum is σ = 37182915000. Its totient is φ = 9892945920.

The previous prime is 20511014401. The next prime is 20511014423. The reversal of 20511014404 is 40441011502.

It can be written as a sum of positive squares in 4 ways, for example, as 1914237504 + 18596776900 = 43752^2 + 136370^2 .

It is not an unprimeable number, because it can be changed into a prime (20511014401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688029 + ... + 717220.

It is an arithmetic number, because the mean of its divisors is an integer number (1549288125).

Almost surely, 2^20511014404 is an apocalyptic number.

It is an amenable number.

20511014404 is a deficient number, since it is larger than the sum of its proper divisors (16671900596).

20511014404 is a wasteful number, since it uses less digits than its factorization.

20511014404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405383 (or 1405381 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 20511014404 its reverse (40441011502), we get a palindrome (60952025906).

The spelling of 20511014404 in words is "twenty billion, five hundred eleven million, fourteen thousand, four hundred four".