1020213643 has 2 divisors, whose sum is σ = 1020213644. Its totient is φ = 1020213642.

The previous prime is 1020213587. The next prime is 1020213653. The reversal of 1020213643 is 3463120201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020213643 - 2¹³ = 1020205451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020213653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106821 + 510106822.

It is an arithmetic number, because the mean of its divisors is an integer number (510106822).

Almost surely, 2^1020213643 is an apocalyptic number.

1020213643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020213643 is an equidigital number, since it uses as much as digits as its factorization.

1020213643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1020213643 is about 31940.7833811258. The cubic root of 1020213643 is about 1006.6929850119.

Adding to 1020213643 its reverse (3463120201), we get a palindrome (4483333844).

The spelling of 1020213643 in words is "one billion, twenty million, two hundred thirteen thousand, six hundred forty-three".