21114672 has 40 divisors (see below), whose sum is σ = 55881840. Its totient is φ = 6865920.

The previous prime is 21114671. The next prime is 21114673. The reversal of 21114672 is 27641112.

It is an interprime number because it is at equal distance from previous prime (21114671) and next prime (21114673).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21114671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3397 + ... + 7332.

It is an arithmetic number, because the mean of its divisors is an integer number (1397046).

Almost surely, 2^21114672 is an apocalyptic number.

It is an amenable number.

21114672 is an abundant number, since it is smaller than the sum of its proper divisors (34767168).

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

21114672 is a wasteful number, since it uses less digits than its factorization.

21114672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10781 (or 10775 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 21114672 is about 4595.0704020722. The cubic root of 21114672 is about 276.3936830947.

Adding to 21114672 its reverse (27641112), we get a palindrome (48755784).

The spelling of 21114672 in words is "twenty-one million, one hundred fourteen thousand, six hundred seventy-two".