21498625423 has 8 divisors (see below), whose sum is σ = 23544306000. Its totient is φ = 19468154880.

The previous prime is 21498625399. The next prime is 21498625433. The reversal of 21498625423 is 32452689412.

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 21498625423 - 2³³ = 12908690831 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 (21498625433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3799548 + ... + 3805201.

It is an arithmetic number, because the mean of its divisors is an integer number (2943038250).

Almost surely, 2^21498625423 is an apocalyptic number.

21498625423 is a deficient number, since it is larger than the sum of its proper divisors (2045680577).

21498625423 is a wasteful number, since it uses less digits than its factorization.

21498625423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605017.

The product of its digits is 829440, while the sum is 46.

The spelling of 21498625423 in words is "twenty-one billion, four hundred ninety-eight million, six hundred twenty-five thousand, four hundred twenty-three".