21228048338 has 24 divisors (see below), whose sum is σ = 38407067712. Its totient is φ = 8618904792.

The previous prime is 21228048337. The next prime is 21228048379. The reversal of 21228048338 is 83384082212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21228048295 and 21228048304.

It is not an unprimeable number, because it can be changed into a prime (21228048337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2095070 + ... + 2105177.

It is an arithmetic number, because the mean of its divisors is an integer number (1600294488).

Almost surely, 2^21228048338 is an apocalyptic number.

21228048338 is a deficient number, since it is larger than the sum of its proper divisors (17179019374).

21228048338 is a wasteful number, since it uses less digits than its factorization.

21228048338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200294 (or 4200275 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 21228048338 in words is "twenty-one billion, two hundred twenty-eight million, forty-eight thousand, three hundred thirty-eight".