21037633103 has 2 divisors, whose sum is σ = 21037633104. Its totient is φ = 21037633102.

The previous prime is 21037633063. The next prime is 21037633147. The reversal of 21037633103 is 30133673012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21037633103 - 2²² = 21033438799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21037633153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10518816551 + 10518816552.

It is an arithmetic number, because the mean of its divisors is an integer number (10518816552).

Almost surely, 2^21037633103 is an apocalyptic number.

21037633103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21037633103 is an equidigital number, since it uses as much as digits as its factorization.

21037633103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 29.

The spelling of 21037633103 in words is "twenty-one billion, thirty-seven million, six hundred thirty-three thousand, one hundred three".