21741952 has 16 divisors (see below), whose sum is σ = 43314300. Its totient is φ = 10870912.

The previous prime is 21741949. The next prime is 21741953. The reversal of 21741952 is 25914712.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21741953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84802 + ... + 85057.

Almost surely, 2^21741952 is an apocalyptic number.

It is an amenable number.

21741952 is a deficient number, since it is larger than the sum of its proper divisors (21572348).

21741952 is an equidigital number, since it uses as much as digits as its factorization.

21741952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169873 (or 169861 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 21741952 is about 4662.8266105443. The cubic root of 21741952 is about 279.1040751138.

The spelling of 21741952 in words is "twenty-one million, seven hundred forty-one thousand, nine hundred fifty-two".