1821013469 has 4 divisors (see below), whose sum is σ = 1986560160. Its totient is φ = 1655466780.

The previous prime is 1821013451. The next prime is 1821013471. The reversal of 1821013469 is 9643101281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1821013469 - 2⁸ = 1821013213 is a prime.

It is a super-2 number, since 2×1821013469² = 6632180108558827922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821013489) 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, 82773329 + ... + 82773350.

It is an arithmetic number, because the mean of its divisors is an integer number (496640040).

Almost surely, 2^1821013469 is an apocalyptic number.

It is an amenable number.

1821013469 is a deficient number, since it is larger than the sum of its proper divisors (165546691).

1821013469 is a wasteful number, since it uses less digits than its factorization.

1821013469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165546690.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1821013469 is about 42673.3344021767. The cubic root of 1821013469 is about 1221.1557329405.

The spelling of 1821013469 in words is "one billion, eight hundred twenty-one million, thirteen thousand, four hundred sixty-nine".