19436937941861 has 16 divisors (see below), whose sum is σ = 21224467188288. Its totient is φ = 17652832876800.

The previous prime is 19436937941831. The next prime is 19436937941873. The reversal of 19436937941861 is 16814973963491.

It is not a de Polignac number, because 19436937941861 - 2¹⁴ = 19436937925477 is a prime.

It is a super-3 number, since 3×19436937941861³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19436937941831) 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, 361167191 + ... + 361221003.

It is an arithmetic number, because the mean of its divisors is an integer number (1326529199268).

Almost surely, 2^{19436937941861} is an apocalyptic number.

19436937941861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19436937941861 is a deficient number, since it is larger than the sum of its proper divisors (1787529246427).

19436937941861 is a wasteful number, since it uses less digits than its factorization.

19436937941861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85012.

The product of its digits is 211631616, while the sum is 71.

The spelling of 19436937941861 in words is "nineteen trillion, four hundred thirty-six billion, nine hundred thirty-seven million, nine hundred forty-one thousand, eight hundred sixty-one".