21901126 has 8 divisors (see below), whose sum is σ = 35378784. Its totient is φ = 10108200.

The previous prime is 21901111. The next prime is 21901133. The reversal of 21901126 is 62110912.

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

It is a junction number, because it is equal to n+sod(n) for n = 21901097 and 21901106.

It is a congruent number.

It is an unprimeable number.

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, 421150 + ... + 421201.

It is an arithmetic number, because the mean of its divisors is an integer number (4422348).

Almost surely, 2^21901126 is an apocalyptic number.

21901126 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21901126 is a deficient number, since it is larger than the sum of its proper divisors (13477658).

21901126 is a wasteful number, since it uses less digits than its factorization.

21901126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842366.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 21901126 is about 4679.8638869095. The cubic root of 21901126 is about 279.7835316708.

The spelling of 21901126 in words is "twenty-one million, nine hundred one thousand, one hundred twenty-six".