1914304821 has 24 divisors (see below), whose sum is σ = 3021355680. Its totient is φ = 1070937120.

The previous prime is 1914304811. The next prime is 1914304859. The reversal of 1914304821 is 1284034191.

It is a happy number.

It is not a de Polignac number, because 1914304821 - 2¹⁵ = 1914272053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1914304811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198111 + ... + 207548.

It is an arithmetic number, because the mean of its divisors is an integer number (125889820).

Almost surely, 2^1914304821 is an apocalyptic number.

1914304821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1914304821 is a deficient number, since it is larger than the sum of its proper divisors (1107050859).

1914304821 is a wasteful number, since it uses less digits than its factorization.

1914304821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405697 (or 405686 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1914304821 is about 43752.7692952115. The cubic root of 1914304821 is about 1241.6628793743.

It can be divided in two parts, 191430 and 4821, that added together give a triangular number (196251 = T₆₂₆).

The spelling of 1914304821 in words is "one billion, nine hundred fourteen million, three hundred four thousand, eight hundred twenty-one".