1020266643 has 16 divisors (see below), whose sum is σ = 1484560512. Its totient is φ = 618120000.

The previous prime is 1020266641. The next prime is 1020266651. The reversal of 1020266643 is 3466620201.

It is not a de Polignac number, because 1020266643 - 2¹ = 1020266641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020266643.

It is not an unprimeable number, because it can be changed into a prime (1020266641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163623 + ... + 169743.

It is an arithmetic number, because the mean of its divisors is an integer number (92785032).

Almost surely, 2^1020266643 is an apocalyptic number.

1020266643 is a deficient number, since it is larger than the sum of its proper divisors (464293869).

1020266643 is a wasteful number, since it uses less digits than its factorization.

1020266643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1020266643 is about 31941.6130306533. The cubic root of 1020266643 is about 1006.7104172444.

Adding to 1020266643 its reverse (3466620201), we get a palindrome (4486886844).

The spelling of 1020266643 in words is "one billion, twenty million, two hundred sixty-six thousand, six hundred forty-three".