21413470228 has 6 divisors (see below), whose sum is σ = 37473572906. Its totient is φ = 10706735112.

The previous prime is 21413470223. The next prime is 21413470241. The reversal of 21413470228 is 82207431412.

It can be written as a sum of positive squares in only one way, i.e., 19779047044 + 1634423184 = 140638^2 + 40428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21413470193 and 21413470202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21413470223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2676683775 + ... + 2676683782.

Almost surely, 2^21413470228 is an apocalyptic number.

It is an amenable number.

21413470228 is a deficient number, since it is larger than the sum of its proper divisors (16060102678).

21413470228 is a wasteful number, since it uses less digits than its factorization.

21413470228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353367561 (or 5353367559 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 21413470228 in words is "twenty-one billion, four hundred thirteen million, four hundred seventy thousand, two hundred twenty-eight".