1021863632 has 40 divisors (see below), whose sum is σ = 2063799456. Its totient is φ = 489684096.

The previous prime is 1021863617. The next prime is 1021863637. The reversal of 1021863632 is 2363681201.

1021863632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021863637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26783 + ... + 52545.

Almost surely, 2^1021863632 is an apocalyptic number.

It is an amenable number.

1021863632 is an abundant number, since it is smaller than the sum of its proper divisors (1041935824).

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

1021863632 is a wasteful number, since it uses less digits than its factorization.

1021863632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25875 (or 25869 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1021863632 is about 31966.6018212759. The cubic root of 1021863632 is about 1007.2354000591.

The spelling of 1021863632 in words is "one billion, twenty-one million, eight hundred sixty-three thousand, six hundred thirty-two".