21114654 has 16 divisors (see below), whose sum is σ = 46068480. Its totient is φ = 6398360.

The previous prime is 21114649. The next prime is 21114659. The reversal of 21114654 is 45641112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21114649) and next prime (21114659).

It is a super-2 number, since 2×21114654² = 891657227079432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114659) 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, 159894 + ... + 160025.

It is an arithmetic number, because the mean of its divisors is an integer number (2879280).

Almost surely, 2^21114654 is an apocalyptic number.

21114654 is an abundant number, since it is smaller than the sum of its proper divisors (24953826).

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

21114654 is a wasteful number, since it uses less digits than its factorization.

21114654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319935.

The product of its digits is 960, while the sum is 24.

The square root of 21114654 is about 4595.0684434511. The cubic root of 21114654 is about 276.3936045539.

Adding to 21114654 its reverse (45641112), we get a palindrome (66755766).

The spelling of 21114654 in words is "twenty-one million, one hundred fourteen thousand, six hundred fifty-four".