21441154 has 16 divisors (see below), whose sum is σ = 36888768. Its totient is φ = 9155952.

The previous prime is 21441137. The next prime is 21441169. The reversal of 21441154 is 45114412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489 + ... + 6715.

It is an arithmetic number, because the mean of its divisors is an integer number (2305548).

Almost surely, 2^21441154 is an apocalyptic number.

21441154 is a deficient number, since it is larger than the sum of its proper divisors (15447614).

21441154 is a wasteful number, since it uses less digits than its factorization.

21441154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529.

The product of its digits is 640, while the sum is 22.

The square root of 21441154 is about 4630.4593724597. The cubic root of 21441154 is about 277.8109664997.

Adding to 21441154 its reverse (45114412), we get a palindrome (66555566).

The spelling of 21441154 in words is "twenty-one million, four hundred forty-one thousand, one hundred fifty-four".