21433948 has 12 divisors (see below), whose sum is σ = 37762200. Its totient is φ = 10644752.

The previous prime is 21433921. The next prime is 21433961. The reversal of 21433948 is 84933412.

It is a congruent number.

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, 17386 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (3146850).

Almost surely, 2^21433948 is an apocalyptic number.

It is an amenable number.

21433948 is a deficient number, since it is larger than the sum of its proper divisors (16328252).

21433948 is a wasteful number, since it uses less digits than its factorization.

21433948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36116 (or 36114 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 21433948 is about 4629.6811985276. The cubic root of 21433948 is about 277.7798405299.

The spelling of 21433948 in words is "twenty-one million, four hundred thirty-three thousand, nine hundred forty-eight".