21419944 has 32 divisors (see below), whose sum is σ = 49432320. Its totient is φ = 8473536.

The previous prime is 21419939. The next prime is 21420001. The reversal of 21419944 is 44991412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13984 + ... + 15439.

It is an arithmetic number, because the mean of its divisors is an integer number (1544760).

Almost surely, 2^21419944 is an apocalyptic number.

It is an amenable number.

21419944 is an abundant number, since it is smaller than the sum of its proper divisors (28012376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21419944 is a wasteful number, since it uses less digits than its factorization.

21419944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29449 (or 29445 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 21419944 is about 4628.1685362571. The cubic root of 21419944 is about 277.7193309683.

The spelling of 21419944 in words is "twenty-one million, four hundred nineteen thousand, nine hundred forty-four".