21014620 has 48 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 7507520.

The previous prime is 21014611. The next prime is 21014629. The reversal of 21014620 is 2641012.

It is an interprime number because it is at equal distance from previous prime (21014611) and next prime (21014629).

It is a super-2 number, since 2×21014620² = 883228507488800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21014594 and 21014603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12171 + ... + 13789.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^21014620 is an apocalyptic number.

21014620 is a gapful number since it is divisible by the number (20) 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 21014620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24494400).

21014620 is an abundant number, since it is smaller than the sum of its proper divisors (27974180).

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

21014620 is a wasteful number, since it uses less digits than its factorization.

21014620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21014620 is about 4584.1705901940. The cubic root of 21014620 is about 275.9564273440.

Adding to 21014620 its reverse (2641012), we get a palindrome (23655632).

The spelling of 21014620 in words is "twenty-one million, fourteen thousand, six hundred twenty".