21435621148 has 36 divisors (see below), whose sum is σ = 39024282136. Its totient is φ = 10300118400.

The previous prime is 21435621127. The next prime is 21435621149. The reversal of 21435621148 is 84112653412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435621149) 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, 426718 + ... + 474298.

Almost surely, 2^21435621148 is an apocalyptic number.

It is an amenable number.

21435621148 is a deficient number, since it is larger than the sum of its proper divisors (17588660988).

21435621148 is a wasteful number, since it uses less digits than its factorization.

21435621148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47734 (or 47691 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The spelling of 21435621148 in words is "twenty-one billion, four hundred thirty-five million, six hundred twenty-one thousand, one hundred forty-eight".