21348030 has 48 divisors (see below), whose sum is σ = 56326032. Its totient is φ = 5174400.

The previous prime is 21348017. The next prime is 21348043. The reversal of 21348030 is 3084312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21348017) and next prime (21348043).

It is a junction number, because it is equal to n+sod(n) for n = 21347988 and 21348006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 690 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (1173459).

Almost surely, 2^21348030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21348030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28163016).

21348030 is an abundant number, since it is smaller than the sum of its proper divisors (34978002).

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

21348030 is a wasteful number, since it uses less digits than its factorization.

21348030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913 (or 5902 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21348030 is about 4620.3928404412. The cubic root of 21348030 is about 277.4081832429.

The spelling of 21348030 in words is "twenty-one million, three hundred forty-eight thousand, thirty".