1821769334 has 48 divisors (see below), whose sum is σ = 3671807760. Its totient is φ = 668021760.

The previous prime is 1821769321. The next prime is 1821769361. The reversal of 1821769334 is 4339671281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31379 + ... + 68030.

It is an arithmetic number, because the mean of its divisors is an integer number (76495995).

Almost surely, 2^1821769334 is an apocalyptic number.

1821769334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1821769334 is an abundant number, since it is smaller than the sum of its proper divisors (1850038426).

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

1821769334 is a wasteful number, since it uses less digits than its factorization.

1821769334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99453 (or 99446 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 1821769334 is about 42682.1898922724. The cubic root of 1821769334 is about 1221.3246683920.

The spelling of 1821769334 in words is "one billion, eight hundred twenty-one million, seven hundred sixty-nine thousand, three hundred thirty-four".