21073008637403 has 2 divisors, whose sum is σ = 21073008637404. Its totient is φ = 21073008637402.

The previous prime is 21073008637379. The next prime is 21073008637427. The reversal of 21073008637403 is 30473680037012.

It is a balanced prime because it is at equal distance from previous prime (21073008637379) and next prime (21073008637427).

It is a cyclic number.

It is not a de Polignac number, because 21073008637403 - 2⁸ = 21073008637147 is a prime.

It is a super-2 number, since 2×21073008637403² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21073008637433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536504318701 + 10536504318702.

It is an arithmetic number, because the mean of its divisors is an integer number (10536504318702).

Almost surely, 2^{21073008637403} is an apocalyptic number.

21073008637403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073008637403 is an equidigital number, since it uses as much as digits as its factorization.

21073008637403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 21073008637403 in words is "twenty-one trillion, seventy-three billion, eight million, six hundred thirty-seven thousand, four hundred three".