19235232421 has 8 divisors (see below), whose sum is σ = 19495019520. Its totient is φ = 18977138208.

The previous prime is 19235232391. The next prime is 19235232427. The reversal of 19235232421 is 12423253291.

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 19235232421 - 2⁹ = 19235231909 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 (19235232427) 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, 400336 + ... + 445801.

It is an arithmetic number, because the mean of its divisors is an integer number (2436877440).

Almost surely, 2^19235232421 is an apocalyptic number.

It is an amenable number.

19235232421 is a deficient number, since it is larger than the sum of its proper divisors (259787099).

19235232421 is a wasteful number, since it uses less digits than its factorization.

19235232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846443.

The product of its digits is 25920, while the sum is 34.

The spelling of 19235232421 in words is "nineteen billion, two hundred thirty-five million, two hundred thirty-two thousand, four hundred twenty-one".