20431564126 has 32 divisors (see below), whose sum is σ = 32390409600. Its totient is φ = 9652231680.

The previous prime is 20431564117. The next prime is 20431564133. The reversal of 20431564126 is 62146513402.

It is a junction number, because it is equal to n+sod(n) for n = 20431564091 and 20431564100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498036 + ... + 537496.

It is an arithmetic number, because the mean of its divisors is an integer number (1012200300).

Almost surely, 2^20431564126 is an apocalyptic number.

20431564126 is a deficient number, since it is larger than the sum of its proper divisors (11958845474).

20431564126 is a wasteful number, since it uses less digits than its factorization.

20431564126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39684.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20431564126 in words is "twenty billion, four hundred thirty-one million, five hundred sixty-four thousand, one hundred twenty-six".