1021813424 has 20 divisors (see below), whose sum is σ = 2096220744. Its totient is φ = 480853248.

The previous prime is 1021813411. The next prime is 1021813427. The reversal of 1021813424 is 4243181201.

It is a junction number, because it is equal to n+sod(n) for n = 1021813393 and 1021813402.

It is not an unprimeable number, because it can be changed into a prime (1021813427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1878062 + ... + 1878605.

Almost surely, 2^1021813424 is an apocalyptic number.

It is an amenable number.

1021813424 is an abundant number, since it is smaller than the sum of its proper divisors (1074407320).

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

1021813424 is a wasteful number, since it uses less digits than its factorization.

1021813424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756692 (or 3756686 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1021813424 is about 31965.8164919966. The cubic root of 1021813424 is about 1007.2189033690.

Adding to 1021813424 its reverse (4243181201), we get a palindrome (5264994625).

The spelling of 1021813424 in words is "one billion, twenty-one million, eight hundred thirteen thousand, four hundred twenty-four".