1821354537 has 8 divisors (see below), whose sum is σ = 2428670304. Its totient is φ = 1214137568.

The previous prime is 1821354527. The next prime is 1821354571. The reversal of 1821354537 is 7354531281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1821354537 - 2¹⁴ = 1821338153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1821354495 and 1821354504.

It is not an unprimeable number, because it can be changed into a prime (1821354527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55813 + ... + 82205.

It is an arithmetic number, because the mean of its divisors is an integer number (303583788).

Almost surely, 2^1821354537 is an apocalyptic number.

It is an amenable number.

1821354537 is a deficient number, since it is larger than the sum of its proper divisors (607315767).

1821354537 is a wasteful number, since it uses less digits than its factorization.

1821354537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49399.

The product of its digits is 100800, while the sum is 39.

The square root of 1821354537 is about 42677.3304811817. The cubic root of 1821354537 is about 1221.2319672556.

The spelling of 1821354537 in words is "one billion, eight hundred twenty-one million, three hundred fifty-four thousand, five hundred thirty-seven".