21415030 has 64 divisors (see below), whose sum is σ = 48117888. Its totient is φ = 6681600.

The previous prime is 21415027. The next prime is 21415067. The reversal of 21415030 is 3051412.

It is a junction number, because it is equal to n+sod(n) for n = 21414995 and 21415013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91794 + ... + 92026.

It is an arithmetic number, because the mean of its divisors is an integer number (751842).

Almost surely, 2^21415030 is an apocalyptic number.

21415030 is an abundant number, since it is smaller than the sum of its proper divisors (26702858).

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

21415030 is a wasteful number, since it uses less digits than its factorization.

21415030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21415030 is about 4627.6376262625. The cubic root of 21415030 is about 277.6980919280.

Adding to 21415030 its reverse (3051412), we get a palindrome (24466442).

The spelling of 21415030 in words is "twenty-one million, four hundred fifteen thousand, thirty".