19956426541 has 8 divisors (see below), whose sum is σ = 21062199200. Its totient is φ = 18856197360.

The previous prime is 19956426527. The next prime is 19956426547. The reversal of 19956426541 is 14562465991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19956426541 - 2¹¹ = 19956424493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19956426547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378470 + ... + 1392871.

It is an arithmetic number, because the mean of its divisors is an integer number (2632774900).

Almost surely, 2^19956426541 is an apocalyptic number.

It is an amenable number.

19956426541 is a deficient number, since it is larger than the sum of its proper divisors (1105772659).

19956426541 is a wasteful number, since it uses less digits than its factorization.

19956426541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771739.

The product of its digits is 2332800, while the sum is 52.

The spelling of 19956426541 in words is "nineteen billion, nine hundred fifty-six million, four hundred twenty-six thousand, five hundred forty-one".