21839098 has 32 divisors (see below), whose sum is σ = 35747712. Its totient is φ = 9979200.

The previous prime is 21839071. The next prime is 21839099. The reversal of 21839098 is 89093812.

It is a self number, because there is not a number n which added to its sum of digits gives 21839098.

It is not an unprimeable number, because it can be changed into a prime (21839099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120568 + ... + 120748.

It is an arithmetic number, because the mean of its divisors is an integer number (1117116).

Almost surely, 2^21839098 is an apocalyptic number.

21839098 is a deficient number, since it is larger than the sum of its proper divisors (13908614).

21839098 is a wasteful number, since it uses less digits than its factorization.

21839098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 21839098 is about 4673.2320721317. The cubic root of 21839098 is about 279.5191491857.

The spelling of 21839098 in words is "twenty-one million, eight hundred thirty-nine thousand, ninety-eight".