6020399921 has 2 divisors, whose sum is σ = 6020399922. Its totient is φ = 6020399920.

The previous prime is 6020399813. The next prime is 6020399923. The reversal of 6020399921 is 1299930206.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4648512400 + 1371887521 = 68180^2 + 37039^2 .

It is a cyclic number.

It is not a de Polignac number, because 6020399921 - 2¹⁰ = 6020398897 is a prime.

Together with 6020399923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6020399923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3010199960 + 3010199961.

It is an arithmetic number, because the mean of its divisors is an integer number (3010199961).

Almost surely, 2^6020399921 is an apocalyptic number.

It is an amenable number.

6020399921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6020399921 is an equidigital number, since it uses as much as digits as its factorization.

6020399921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 6020399921 is about 77591.2361094989. The cubic root of 6020399921 is about 1819.1776586218.

The spelling of 6020399921 in words is "six billion, twenty million, three hundred ninety-nine thousand, nine hundred twenty-one".