21219499148 has 6 divisors (see below), whose sum is σ = 37134123516. Its totient is φ = 10609749572.

The previous prime is 21219499129. The next prime is 21219499159. The reversal of 21219499148 is 84199491212.

It is a junction number, because it is equal to n+sod(n) for n = 21219499096 and 21219499105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2652437390 + ... + 2652437397.

It is an arithmetic number, because the mean of its divisors is an integer number (6189020586).

Almost surely, 2^21219499148 is an apocalyptic number.

It is an amenable number.

21219499148 is a deficient number, since it is larger than the sum of its proper divisors (15914624368).

21219499148 is a wasteful number, since it uses less digits than its factorization.

21219499148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304874791 (or 5304874789 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The spelling of 21219499148 in words is "twenty-one billion, two hundred nineteen million, four hundred ninety-nine thousand, one hundred forty-eight".