1921424554 has 48 divisors (see below), whose sum is σ = 3510988416. Its totient is φ = 784845600.

The previous prime is 1921424501. The next prime is 1921424569. The reversal of 1921424554 is 4554241291.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 699624 + ... + 702364.

It is an arithmetic number, because the mean of its divisors is an integer number (73145592).

Almost surely, 2^1921424554 is an apocalyptic number.

1921424554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1921424554 is a deficient number, since it is larger than the sum of its proper divisors (1589563862).

1921424554 is a wasteful number, since it uses less digits than its factorization.

1921424554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091 (or 3084 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 1921424554 is about 43834.0570105027. The cubic root of 1921424554 is about 1243.2003167018.

The spelling of 1921424554 in words is "one billion, nine hundred twenty-one million, four hundred twenty-four thousand, five hundred fifty-four".