1824000021 has 12 divisors (see below), whose sum is σ = 2635927372. Its totient is φ = 1215418176.

The previous prime is 1824000007. The next prime is 1824000043. The reversal of 1824000021 is 1200004281.

It can be written as a sum of positive squares in 2 ways, for example, as 375816996 + 1448183025 = 19386^2 + 38055^2 .

It is not a de Polignac number, because 1824000021 - 2²² = 1819805717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1823999958 and 1824000003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1824000001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28186 + ... + 66651.

Almost surely, 2^1824000021 is an apocalyptic number.

It is an amenable number.

1824000021 is a deficient number, since it is larger than the sum of its proper divisors (811927351).

1824000021 is a wasteful number, since it uses less digits than its factorization.

1824000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96980 (or 96977 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1824000021 is about 42708.3132539790. The cubic root of 1824000021 is about 1221.8229535469.

The spelling of 1824000021 in words is "one billion, eight hundred twenty-four million, twenty-one", and thus it is an aban number.