21943112 has 8 divisors (see below), whose sum is σ = 41143350. Its totient is φ = 10971552.

The previous prime is 21943099. The next prime is 21943171. The reversal of 21943112 is 21134912.

It can be written as a sum of positive squares in only one way, i.e., 13498276 + 8444836 = 3674^2 + 2906^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371437 + ... + 1371452.

Almost surely, 2^21943112 is an apocalyptic number.

It is an amenable number.

21943112 is a deficient number, since it is larger than the sum of its proper divisors (19200238).

21943112 is a wasteful number, since it uses less digits than its factorization.

21943112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742895 (or 2742891 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 21943112 is about 4684.3475532885. The cubic root of 21943112 is about 279.9622057831.

The spelling of 21943112 in words is "twenty-one million, nine hundred forty-three thousand, one hundred twelve".