21020153327 has 2 divisors, whose sum is σ = 21020153328. Its totient is φ = 21020153326.

The previous prime is 21020153309. The next prime is 21020153423. The reversal of 21020153327 is 72335102012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020153327 - 2⁸ = 21020153071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21020153296 and 21020153305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020153827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510076663 + 10510076664.

It is an arithmetic number, because the mean of its divisors is an integer number (10510076664).

Almost surely, 2^21020153327 is an apocalyptic number.

21020153327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020153327 is an equidigital number, since it uses as much as digits as its factorization.

21020153327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

Adding to 21020153327 its reverse (72335102012), we get a palindrome (93355255339).

The spelling of 21020153327 in words is "twenty-one billion, twenty million, one hundred fifty-three thousand, three hundred twenty-seven".