20630505404 has 24 divisors (see below), whose sum is σ = 36274366800. Its totient is φ = 10266512256.

The previous prime is 20630505403. The next prime is 20630505421. The reversal of 20630505404 is 40450503602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630505403) 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 7 ways as a sum of consecutive naturals, for example, 750104 + ... + 777120.

It is an arithmetic number, because the mean of its divisors is an integer number (1511431950).

Almost surely, 2^20630505404 is an apocalyptic number.

It is an amenable number.

20630505404 is a deficient number, since it is larger than the sum of its proper divisors (15643861396).

20630505404 is a wasteful number, since it uses less digits than its factorization.

20630505404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27917 (or 27915 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20630505404 in words is "twenty billion, six hundred thirty million, five hundred five thousand, four hundred four".