21419630 has 32 divisors (see below), whose sum is σ = 40007520. Its totient is φ = 8250880.

The previous prime is 21419623. The next prime is 21419681. The reversal of 21419630 is 3691412.

It is a self number, because there is not a number n which added to its sum of digits gives 21419630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36197 + ... + 36783.

It is an arithmetic number, because the mean of its divisors is an integer number (1250235).

Almost surely, 2^21419630 is an apocalyptic number.

21419630 is a deficient number, since it is larger than the sum of its proper divisors (18587890).

21419630 is a wasteful number, since it uses less digits than its factorization.

21419630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 21419630 is about 4628.1346134269. The cubic root of 21419630 is about 277.7179739107.

The spelling of 21419630 in words is "twenty-one million, four hundred nineteen thousand, six hundred thirty".