19936841261 has 16 divisors (see below), whose sum is σ = 20665387008. Its totient is φ = 19221206400.

The previous prime is 19936841219. The next prime is 19936841269. The reversal of 19936841261 is 16214863991.

It is a cyclic number.

It is not a de Polignac number, because 19936841261 - 2¹⁴ = 19936824877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19936841269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176116 + ... + 1192946.

It is an arithmetic number, because the mean of its divisors is an integer number (1291586688).

Almost surely, 2^19936841261 is an apocalyptic number.

It is an amenable number.

19936841261 is a deficient number, since it is larger than the sum of its proper divisors (728545747).

19936841261 is a wasteful number, since it uses less digits than its factorization.

19936841261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17212.

The product of its digits is 559872, while the sum is 50.

The spelling of 19936841261 in words is "nineteen billion, nine hundred thirty-six million, eight hundred forty-one thousand, two hundred sixty-one".