21983026 has 16 divisors (see below), whose sum is σ = 35590464. Its totient is φ = 10123344.

The previous prime is 21983021. The next prime is 21983029. The reversal of 21983026 is 62038912.

It is not an unprimeable number, because it can be changed into a prime (21983021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18321 + ... + 19483.

It is an arithmetic number, because the mean of its divisors is an integer number (2224404).

Almost surely, 2^21983026 is an apocalyptic number.

21983026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21983026 is a deficient number, since it is larger than the sum of its proper divisors (13607438).

21983026 is a wasteful number, since it uses less digits than its factorization.

21983026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21983026 is about 4688.6059761938. The cubic root of 21983026 is about 280.1318511672.

The spelling of 21983026 in words is "twenty-one million, nine hundred eighty-three thousand, twenty-six".