21254496 has 24 divisors (see below), whose sum is σ = 55793304. Its totient is φ = 7084800.

The previous prime is 21254491. The next prime is 21254567. The reversal of 21254496 is 69445212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21254491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110605 + ... + 110796.

It is an arithmetic number, because the mean of its divisors is an integer number (2324721).

Almost surely, 2^21254496 is an apocalyptic number.

It is an amenable number.

21254496 is an abundant number, since it is smaller than the sum of its proper divisors (34538808).

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

21254496 is a wasteful number, since it uses less digits than its factorization.

21254496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221414 (or 221406 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 21254496 is about 4610.2598625240. The cubic root of 21254496 is about 277.0024458159.

The spelling of 21254496 in words is "twenty-one million, two hundred fifty-four thousand, four hundred ninety-six".