21514104 has 48 divisors (see below), whose sum is σ = 59631000. Its totient is φ = 7003584.

The previous prime is 21514091. The next prime is 21514117. The reversal of 21514104 is 40141512.

It is an interprime number because it is at equal distance from previous prime (21514091) and next prime (21514117).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 379 + ... + 6570.

Almost surely, 2^21514104 is an apocalyptic number.

21514104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21514104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29815500).

21514104 is an abundant number, since it is smaller than the sum of its proper divisors (38116896).

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

21514104 is a wasteful number, since it uses less digits than its factorization.

21514104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004 (or 6997 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 21514104 is about 4638.3298718396. The cubic root of 21514104 is about 278.1256785574.

Adding to 21514104 its reverse (40141512), we get a palindrome (61655616).

The spelling of 21514104 in words is "twenty-one million, five hundred fourteen thousand, one hundred four".