21451114 has 16 divisors (see below), whose sum is σ = 34512480. Its totient is φ = 9968400.

The previous prime is 21451103. The next prime is 21451121. The reversal of 21451114 is 41115412.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 21451091 and 21451100.

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, 3312 + ... + 7339.

It is an arithmetic number, because the mean of its divisors is an integer number (2157030).

Almost surely, 2^21451114 is an apocalyptic number.

21451114 is a deficient number, since it is larger than the sum of its proper divisors (13061366).

21451114 is a wasteful number, since it uses less digits than its factorization.

21451114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725.

The product of its digits is 160, while the sum is 19.

The square root of 21451114 is about 4631.5347348368. The cubic root of 21451114 is about 277.8539767606.

Adding to 21451114 its reverse (41115412), we get a palindrome (62566526).

The spelling of 21451114 in words is "twenty-one million, four hundred fifty-one thousand, one hundred fourteen".