21894898 has 8 divisors (see below), whose sum is σ = 33730092. Its totient is φ = 10651536.

The previous prime is 21894893. The next prime is 21894907. The reversal of 21894898 is 89849812.

It can be written as a sum of positive squares in 2 ways, for example, as 21501769 + 393129 = 4637^2 + 627^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21894893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147865 + ... + 148012.

Almost surely, 2^21894898 is an apocalyptic number.

21894898 is a deficient number, since it is larger than the sum of its proper divisors (11835194).

21894898 is a wasteful number, since it uses less digits than its factorization.

21894898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295916.

The product of its digits is 331776, while the sum is 49.

The square root of 21894898 is about 4679.1984356298. The cubic root of 21894898 is about 279.7570085744.

The spelling of 21894898 in words is "twenty-one million, eight hundred ninety-four thousand, eight hundred ninety-eight".