20431330404 has 12 divisors (see below), whose sum is σ = 47673104304. Its totient is φ = 6810443464.

The previous prime is 20431330351. The next prime is 20431330411. The reversal of 20431330404 is 40403313402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×20431330404³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851305422 + ... + 851305445.

It is an arithmetic number, because the mean of its divisors is an integer number (3972758692).

Almost surely, 2^20431330404 is an apocalyptic number.

It is an amenable number.

20431330404 is an abundant number, since it is smaller than the sum of its proper divisors (27241773900).

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

20431330404 is a wasteful number, since it uses less digits than its factorization.

20431330404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702610874 (or 1702610872 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20431330404 its reverse (40403313402), we get a palindrome (60834643806).

The spelling of 20431330404 in words is "twenty billion, four hundred thirty-one million, three hundred thirty thousand, four hundred four".