21629366730 has 96 divisors (see below), whose sum is σ = 60996853008. Its totient is φ = 5296128000.

The previous prime is 21629366701. The next prime is 21629366753. The reversal of 21629366730 is 3766392612.

21629366730 is a `hidden beast` number, since 216 + 2 + 9 + 366 + 73 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 5055636609 + 16573730121 = 71103^2 + 128739^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109671 + ... + 235130.

Almost surely, 2^21629366730 is an apocalyptic number.

21629366730 is an abundant number, since it is smaller than the sum of its proper divisors (39367486278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21629366730 is a wasteful number, since it uses less digits than its factorization.

21629366730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344872 (or 344869 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 21629366730 in words is "twenty-one billion, six hundred twenty-nine million, three hundred sixty-six thousand, seven hundred thirty".