21754344 has 16 divisors (see below), whose sum is σ = 54385920. Its totient is φ = 7251440.

The previous prime is 21754307. The next prime is 21754351. The reversal of 21754344 is 44345712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453192 + ... + 453239.

It is an arithmetic number, because the mean of its divisors is an integer number (3399120).

Almost surely, 2^21754344 is an apocalyptic number.

21754344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21754344 is an abundant number, since it is smaller than the sum of its proper divisors (32631576).

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

21754344 is a wasteful number, since it uses less digits than its factorization.

21754344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906440 (or 906436 counting only the distinct ones).

The product of its digits is 13440, while the sum is 30.

The square root of 21754344 is about 4664.1552289777. The cubic root of 21754344 is about 279.1570909119.

The spelling of 21754344 in words is "twenty-one million, seven hundred fifty-four thousand, three hundred forty-four".