21295423783 has 2 divisors, whose sum is σ = 21295423784. Its totient is φ = 21295423782.

The previous prime is 21295423777. The next prime is 21295423789. The reversal of 21295423783 is 38732459212.

It is a balanced prime because it is at equal distance from previous prime (21295423777) and next prime (21295423789).

It is a cyclic number.

It is not a de Polignac number, because 21295423783 - 2³³ = 12705489191 is a prime.

It is a super-4 number, since 4×21295423783⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21295423789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10647711891 + 10647711892.

It is an arithmetic number, because the mean of its divisors is an integer number (10647711892).

Almost surely, 2^21295423783 is an apocalyptic number.

21295423783 is a deficient number, since it is larger than the sum of its proper divisors (1).

21295423783 is an equidigital number, since it uses as much as digits as its factorization.

21295423783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The spelling of 21295423783 in words is "twenty-one billion, two hundred ninety-five million, four hundred twenty-three thousand, seven hundred eighty-three".