19964218435 has 16 divisors (see below), whose sum is σ = 27962044416. Its totient is φ = 13398477408.

The previous prime is 19964218433. The next prime is 19964218459. The reversal of 19964218435 is 53481246991.

It is a cyclic number.

It is not a de Polignac number, because 19964218435 - 2¹ = 19964218433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19964218433) 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, 6066507 + ... + 6069796.

It is an arithmetic number, because the mean of its divisors is an integer number (1747627776).

Almost surely, 2^19964218435 is an apocalyptic number.

19964218435 is a deficient number, since it is larger than the sum of its proper divisors (7997825981).

19964218435 is a wasteful number, since it uses less digits than its factorization.

19964218435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12136362.

The product of its digits is 1866240, while the sum is 52.

The spelling of 19964218435 in words is "nineteen billion, nine hundred sixty-four million, two hundred eighteen thousand, four hundred thirty-five".