1826633381 has 4 divisors (see below), whose sum is σ = 1922772000. Its totient is φ = 1730494764.

The previous prime is 1826633377. The next prime is 1826633383. The reversal of 1826633381 is 1833366281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1826633381 - 2² = 1826633377 is a prime.

It is a super-2 number, since 2×1826633381² = 6673179017166982322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826633383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48069281 + ... + 48069318.

It is an arithmetic number, because the mean of its divisors is an integer number (480693000).

Almost surely, 2^1826633381 is an apocalyptic number.

It is an amenable number.

1826633381 is a deficient number, since it is larger than the sum of its proper divisors (96138619).

1826633381 is an equidigital number, since it uses as much as digits as its factorization.

1826633381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96138618.

The product of its digits is 124416, while the sum is 41.

The square root of 1826633381 is about 42739.1317295988. The cubic root of 1826633381 is about 1222.4106641643.

The spelling of 1826633381 in words is "one billion, eight hundred twenty-six million, six hundred thirty-three thousand, three hundred eighty-one".