1821432503950 has 24 divisors (see below), whose sum is σ = 3400458774120. Its totient is φ = 725864546400.

The previous prime is 1821432503927. The next prime is 1821432503983. The reversal of 1821432503950 is 593052341281.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1821432503897 and 1821432503906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67697796 + ... + 67724695.

It is an arithmetic number, because the mean of its divisors is an integer number (141685782255).

Almost surely, 2^{1821432503950} is an apocalyptic number.

1821432503950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1821432503950 is a deficient number, since it is larger than the sum of its proper divisors (1579026270170).

1821432503950 is a wasteful number, since it uses less digits than its factorization.

1821432503950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135422772 (or 135422767 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1821432503950 in words is "one trillion, eight hundred twenty-one billion, four hundred thirty-two million, five hundred three thousand, nine hundred fifty".