1823864493 has 32 divisors (see below), whose sum is σ = 2696343552. Its totient is φ = 1087385600.

The previous prime is 1823864489. The next prime is 1823864507. The reversal of 1823864493 is 3944683281.

It is a cyclic number.

It is not a de Polignac number, because 1823864493 - 2² = 1823864489 is a prime.

It is a super-2 number, since 2×1823864493² = 6652963377652294098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1823864443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 702628 + ... + 705218.

It is an arithmetic number, because the mean of its divisors is an integer number (84260736).

Almost surely, 2^1823864493 is an apocalyptic number.

It is an amenable number.

1823864493 is a deficient number, since it is larger than the sum of its proper divisors (872479059).

1823864493 is a wasteful number, since it uses less digits than its factorization.

1823864493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945.

The product of its digits is 995328, while the sum is 48.

The square root of 1823864493 is about 42706.7265544902. The cubic root of 1823864493 is about 1221.7926912442.

The spelling of 1823864493 in words is "one billion, eight hundred twenty-three million, eight hundred sixty-four thousand, four hundred ninety-three".