1020643194 has 32 divisors (see below), whose sum is σ = 2115970560. Its totient is φ = 327859200.

The previous prime is 1020643177. The next prime is 1020643201. The reversal of 1020643194 is 4913460201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33442 + ... + 56210.

It is an arithmetic number, because the mean of its divisors is an integer number (66124080).

Almost surely, 2^1020643194 is an apocalyptic number.

1020643194 is an abundant number, since it is smaller than the sum of its proper divisors (1095327366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020643194 is a wasteful number, since it uses less digits than its factorization.

1020643194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23046.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1020643194 is about 31947.5068510831. The cubic root of 1020643194 is about 1006.8342512738.

The spelling of 1020643194 in words is "one billion, twenty million, six hundred forty-three thousand, one hundred ninety-four".