19828431 has 24 divisors (see below), whose sum is σ = 33864480. Its totient is φ = 10938816.

The previous prime is 19828429. The next prime is 19828439. The reversal of 19828431 is 13482891.

It is not a de Polignac number, because 19828431 - 2¹ = 19828429 is a prime.

It is a super-2 number, since 2×19828431² = 786333351843522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19828439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3600 + ... + 7253.

It is an arithmetic number, because the mean of its divisors is an integer number (1411020).

Almost surely, 2^19828431 is an apocalyptic number.

19828431 is a deficient number, since it is larger than the sum of its proper divisors (14036049).

19828431 is a wasteful number, since it uses less digits than its factorization.

19828431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10895 (or 10892 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 19828431 is about 4452.9126423050. The cubic root of 19828431 is about 270.6633483446.

The spelling of 19828431 in words is "nineteen million, eight hundred twenty-eight thousand, four hundred thirty-one".