2021493893 has 2 divisors, whose sum is σ = 2021493894. Its totient is φ = 2021493892.

The previous prime is 2021493883. The next prime is 2021493899. The reversal of 2021493893 is 3983941202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1944633604 + 76860289 = 44098^2 + 8767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021493893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021493893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021493899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010746946 + 1010746947.

It is an arithmetic number, because the mean of its divisors is an integer number (1010746947).

Almost surely, 2^2021493893 is an apocalyptic number.

It is an amenable number.

2021493893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021493893 is an equidigital number, since it uses as much as digits as its factorization.

2021493893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 2021493893 is about 44961.0263784091. The cubic root of 2021493893 is about 1264.4184119021.

The spelling of 2021493893 in words is "two billion, twenty-one million, four hundred ninety-three thousand, eight hundred ninety-three".