21037633107 has 8 divisors (see below), whose sum is σ = 28133413776. Its totient is φ = 13983470592.

The previous prime is 21037633103. The next prime is 21037633147. The reversal of 21037633107 is 70133673012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21037633107 - 2² = 21037633103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21037633103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10403358 + ... + 10405379.

It is an arithmetic number, because the mean of its divisors is an integer number (3516676722).

Almost surely, 2^21037633107 is an apocalyptic number.

21037633107 is a deficient number, since it is larger than the sum of its proper divisors (7095780669).

21037633107 is a wasteful number, since it uses less digits than its factorization.

21037633107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20809077.

The product of its (nonzero) digits is 15876, while the sum is 33.

The spelling of 21037633107 in words is "twenty-one billion, thirty-seven million, six hundred thirty-three thousand, one hundred seven".