19923735487 has 8 divisors (see below), whose sum is σ = 20799792000. Its totient is φ = 19048496280.

The previous prime is 19923735397. The next prime is 19923735499. The reversal of 19923735487 is 78453732991.

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

It is a cyclic number.

It is not a de Polignac number, because 19923735487 - 2²³ = 19915346879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19923735187) 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, 154237 + ... + 252262.

It is an arithmetic number, because the mean of its divisors is an integer number (2599974000).

Almost surely, 2^19923735487 is an apocalyptic number.

19923735487 is a deficient number, since it is larger than the sum of its proper divisors (876056513).

19923735487 is a wasteful number, since it uses less digits than its factorization.

19923735487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408653.

The product of its digits is 11430720, while the sum is 58.

The spelling of 19923735487 in words is "nineteen billion, nine hundred twenty-three million, seven hundred thirty-five thousand, four hundred eighty-seven".