20143556426 has 32 divisors (see below), whose sum is σ = 35803520640. Its totient is φ = 8316374976.

The previous prime is 20143556413. The next prime is 20143556509. The reversal of 20143556426 is 62465534102.

It is a self number, because there is not a number n which added to its sum of digits gives 20143556426.

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, 123860 + ... + 235856.

It is an arithmetic number, because the mean of its divisors is an integer number (1118860020).

Almost surely, 2^20143556426 is an apocalyptic number.

20143556426 is a deficient number, since it is larger than the sum of its proper divisors (15659964214).

20143556426 is a wasteful number, since it uses less digits than its factorization.

20143556426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112478.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 20143556426 in words is "twenty billion, one hundred forty-three million, five hundred fifty-six thousand, four hundred twenty-six".