21494198 has 12 divisors (see below), whose sum is σ = 35439180. Its totient is φ = 9769980.

The previous prime is 21494183. The next prime is 21494219. The reversal of 21494198 is 89149412.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44168 + ... + 44651.

It is an arithmetic number, because the mean of its divisors is an integer number (2953265).

Almost surely, 2^21494198 is an apocalyptic number.

21494198 is a deficient number, since it is larger than the sum of its proper divisors (13944982).

21494198 is a wasteful number, since it uses less digits than its factorization.

21494198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88843 (or 88832 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 21494198 is about 4636.1835597828. The cubic root of 21494198 is about 278.0398731690.

The spelling of 21494198 in words is "twenty-one million, four hundred ninety-four thousand, one hundred ninety-eight".