21073008637703 has 16 divisors (see below), whose sum is σ = 23130426212736. Its totient is φ = 19039212635040.

The previous prime is 21073008637669. The next prime is 21073008637739. The reversal of 21073008637703 is 30773680037012.

It is a cyclic number.

It is not a de Polignac number, because 21073008637703 - 2¹⁶ = 21073008572167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073008637403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71955776 + ... + 72248042.

It is an arithmetic number, because the mean of its divisors is an integer number (1445651638296).

Almost surely, 2^{21073008637703} is an apocalyptic number.

21073008637703 is a deficient number, since it is larger than the sum of its proper divisors (2057417575033).

21073008637703 is a wasteful number, since it uses less digits than its factorization.

21073008637703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332654.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 21073008637703 in words is "twenty-one trillion, seventy-three billion, eight million, six hundred thirty-seven thousand, seven hundred three".