21798429453 has 24 divisors (see below), whose sum is σ = 32662156800. Its totient is φ = 14528118528.

The previous prime is 21798429379. The next prime is 21798429461. The reversal of 21798429453 is 35492489712.

21798429453 is a `hidden beast` number, since 2 + 179 + 8 + 429 + 45 + 3 = 666.

It is not a de Polignac number, because 21798429453 - 2⁹ = 21798428941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21798429453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21798429463) 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, 999853 + ... + 1021421.

It is an arithmetic number, because the mean of its divisors is an integer number (1360923200).

Almost surely, 2^21798429453 is an apocalyptic number.

It is an amenable number.

21798429453 is a deficient number, since it is larger than the sum of its proper divisors (10863727347).

21798429453 is an equidigital number, since it uses as much as digits as its factorization.

21798429453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25743 (or 25731 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 21798429453 in words is "twenty-one billion, seven hundred ninety-eight million, four hundred twenty-nine thousand, four hundred fifty-three".