21119430 has 16 divisors (see below), whose sum is σ = 50686704. Its totient is φ = 5631840.

The previous prime is 21119419. The next prime is 21119471. The reversal of 21119430 is 3491112.

It is a junction number, because it is equal to n+sod(n) for n = 21119397 and 21119406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351961 + ... + 352020.

It is an arithmetic number, because the mean of its divisors is an integer number (3167919).

Almost surely, 2^21119430 is an apocalyptic number.

21119430 is an abundant number, since it is smaller than the sum of its proper divisors (29567274).

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

21119430 is a wasteful number, since it uses less digits than its factorization.

21119430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703991.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21119430 is about 4595.5881016471. The cubic root of 21119430 is about 276.4144424727.

The spelling of 21119430 in words is "twenty-one million, one hundred nineteen thousand, four hundred thirty".