21019114 has 4 divisors (see below), whose sum is σ = 31528674. Its totient is φ = 10509556.

The previous prime is 21019069. The next prime is 21019127. The reversal of 21019114 is 41191012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 10029889 = 3315^2 + 3167^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21019091 and 21019100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5254777 + ... + 5254780.

Almost surely, 2^21019114 is an apocalyptic number.

21019114 is a deficient number, since it is larger than the sum of its proper divisors (10509560).

21019114 is a wasteful number, since it uses less digits than its factorization.

21019114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10509559.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 21019114 is about 4584.6607289962. The cubic root of 21019114 is about 275.9760971388.

The spelling of 21019114 in words is "twenty-one million, nineteen thousand, one hundred fourteen".