21037633147 has 2 divisors, whose sum is σ = 21037633148. Its totient is φ = 21037633146.

The previous prime is 21037633103. The next prime is 21037633153. The reversal of 21037633147 is 74133673012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21037633147 is a prime.

It is not a weakly prime, because it can be changed into another prime (21037633157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10518816573 + 10518816574.

It is an arithmetic number, because the mean of its divisors is an integer number (10518816574).

Almost surely, 2^21037633147 is an apocalyptic number.

21037633147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21037633147 is an equidigital number, since it uses as much as digits as its factorization.

21037633147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 37.

The spelling of 21037633147 in words is "twenty-one billion, thirty-seven million, six hundred thirty-three thousand, one hundred forty-seven".