1021873616 has 20 divisors (see below), whose sum is σ = 1980595332. Its totient is φ = 510752256.

The previous prime is 1021873579. The next prime is 1021873649. The reversal of 1021873616 is 6163781201.

1021873616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 559795600 + 462078016 = 23660^2 + 21496^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41546 + ... + 61398.

Almost surely, 2^1021873616 is an apocalyptic number.

1021873616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1021873616 is a deficient number, since it is larger than the sum of its proper divisors (958721716).

1021873616 is a wasteful number, since it uses less digits than its factorization.

1021873616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23078 (or 23072 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1021873616 is about 31966.7579838807. The cubic root of 1021873616 is about 1007.2386804073.

The spelling of 1021873616 in words is "one billion, twenty-one million, eight hundred seventy-three thousand, six hundred sixteen".