21014512093 has 2 divisors, whose sum is σ = 21014512094. Its totient is φ = 21014512092.

The previous prime is 21014512091. The next prime is 21014512133. The reversal of 21014512093 is 39021541012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20766827449 + 247684644 = 144107^2 + 15738^2 .

It is a cyclic number.

It is not a de Polignac number, because 21014512093 - 2¹ = 21014512091 is a prime.

Together with 21014512091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21014512091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507256046 + 10507256047.

It is an arithmetic number, because the mean of its divisors is an integer number (10507256047).

Almost surely, 2^21014512093 is an apocalyptic number.

It is an amenable number.

21014512093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21014512093 is an equidigital number, since it uses as much as digits as its factorization.

21014512093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 21014512093 in words is "twenty-one billion, fourteen million, five hundred twelve thousand, ninety-three".