21119078 has 4 divisors (see below), whose sum is σ = 31678620. Its totient is φ = 10559538.

The previous prime is 21119057. The next prime is 21119081. The reversal of 21119078 is 87091112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21119078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5279768 + ... + 5279771.

It is an arithmetic number, because the mean of its divisors is an integer number (7919655).

Almost surely, 2^21119078 is an apocalyptic number.

21119078 is a deficient number, since it is larger than the sum of its proper divisors (10559542).

21119078 is a wasteful number, since it uses less digits than its factorization.

21119078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10559541.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 21119078 is about 4595.5498038864. The cubic root of 21119078 is about 276.4129067870.

The spelling of 21119078 in words is "twenty-one million, one hundred nineteen thousand, seventy-eight".