21460233671 has 2 divisors, whose sum is σ = 21460233672. Its totient is φ = 21460233670.

The previous prime is 21460233647. The next prime is 21460233787. The reversal of 21460233671 is 17633206412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21460233671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21460233871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10730116835 + 10730116836.

It is an arithmetic number, because the mean of its divisors is an integer number (10730116836).

Almost surely, 2^21460233671 is an apocalyptic number.

21460233671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21460233671 is an equidigital number, since it uses as much as digits as its factorization.

21460233671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 21460233671 in words is "twenty-one billion, four hundred sixty million, two hundred thirty-three thousand, six hundred seventy-one".