21798429452 has 24 divisors (see below), whose sum is σ = 40409819856. Its totient is φ = 10253357568.

The previous prime is 21798429379. The next prime is 21798429461. The reversal of 21798429452 is 25492489712.

It is a junction number, because it is equal to n+sod(n) for n = 21798429394 and 21798429403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77048 + ... + 222560.

It is an arithmetic number, because the mean of its divisors is an integer number (1683742494).

Almost surely, 2^21798429452 is an apocalyptic number.

It is an amenable number.

21798429452 is a deficient number, since it is larger than the sum of its proper divisors (18611390404).

21798429452 is a wasteful number, since it uses less digits than its factorization.

21798429452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147737 (or 147735 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The spelling of 21798429452 in words is "twenty-one billion, seven hundred ninety-eight million, four hundred twenty-nine thousand, four hundred fifty-two".