21233454 has 32 divisors (see below), whose sum is σ = 46497024. Its totient is φ = 6410880.

The previous prime is 21233453. The next prime is 21233461. The reversal of 21233454 is 45433212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28207 + ... + 28949.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^21233454 is an apocalyptic number.

21233454 is an abundant number, since it is smaller than the sum of its proper divisors (25263570).

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

21233454 is a wasteful number, since it uses less digits than its factorization.

21233454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192.

The product of its digits is 2880, while the sum is 24.

The square root of 21233454 is about 4607.9772134853. The cubic root of 21233454 is about 276.9110046138.

Adding to 21233454 its reverse (45433212), we get a palindrome (66666666).

The spelling of 21233454 in words is "twenty-one million, two hundred thirty-three thousand, four hundred fifty-four".