20519980126 has 16 divisors (see below), whose sum is σ = 32520430800. Its totient is φ = 9683851968.

The previous prime is 20519980111. The next prime is 20519980193. The reversal of 20519980126 is 62108991502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993495 + ... + 1013938.

It is an arithmetic number, because the mean of its divisors is an integer number (2032526925).

Almost surely, 2^20519980126 is an apocalyptic number.

20519980126 is a deficient number, since it is larger than the sum of its proper divisors (12000450674).

20519980126 is a wasteful number, since it uses less digits than its factorization.

20519980126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007723.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 20519980126 in words is "twenty billion, five hundred nineteen million, nine hundred eighty thousand, one hundred twenty-six".