1821613364 has 24 divisors (see below), whose sum is σ = 3208128000. Its totient is φ = 905018400.

The previous prime is 1821613349. The next prime is 1821613411. The reversal of 1821613364 is 4633161281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034717 + ... + 1036475.

It is an arithmetic number, because the mean of its divisors is an integer number (133672000).

Almost surely, 2^1821613364 is an apocalyptic number.

It is an amenable number.

1821613364 is a deficient number, since it is larger than the sum of its proper divisors (1386514636).

1821613364 is a wasteful number, since it uses less digits than its factorization.

1821613364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263 (or 3261 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 1821613364 is about 42680.3627444754. The cubic root of 1821613364 is about 1221.2898130014.

The spelling of 1821613364 in words is "one billion, eight hundred twenty-one million, six hundred thirteen thousand, three hundred sixty-four".