1821494830 has 32 divisors (see below), whose sum is σ = 3417608736. Its totient is φ = 698315904.

The previous prime is 1821494827. The next prime is 1821494837. The reversal of 1821494830 is 384941281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821494837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11949 + ... + 61528.

It is an arithmetic number, because the mean of its divisors is an integer number (106800273).

Almost surely, 2^1821494830 is an apocalyptic number.

1821494830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1821494830 is a deficient number, since it is larger than the sum of its proper divisors (1596113906).

1821494830 is a wasteful number, since it uses less digits than its factorization.

1821494830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73588.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1821494830 is about 42678.9740973234. The cubic root of 1821494830 is about 1221.2633222891.

The spelling of 1821494830 in words is "one billion, eight hundred twenty-one million, four hundred ninety-four thousand, eight hundred thirty".