21397261703 has 2 divisors, whose sum is σ = 21397261704. Its totient is φ = 21397261702.

The previous prime is 21397261681. The next prime is 21397261733. The reversal of 21397261703 is 30716279312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21397261703 - 2¹⁴ = 21397245319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21397261733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10698630851 + 10698630852.

It is an arithmetic number, because the mean of its divisors is an integer number (10698630852).

Almost surely, 2^21397261703 is an apocalyptic number.

21397261703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21397261703 is an equidigital number, since it uses as much as digits as its factorization.

21397261703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The spelling of 21397261703 in words is "twenty-one billion, three hundred ninety-seven million, two hundred sixty-one thousand, seven hundred three".