21910153 has 4 divisors (see below), whose sum is σ = 22067920. Its totient is φ = 21752388.

The previous prime is 21910123. The next prime is 21910157. The reversal of 21910153 is 35101912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21910153 - 2⁵ = 21910121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21910157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78675 + ... + 78952.

It is an arithmetic number, because the mean of its divisors is an integer number (5516980).

Almost surely, 2^21910153 is an apocalyptic number.

It is an amenable number.

21910153 is a deficient number, since it is larger than the sum of its proper divisors (157767).

21910153 is a wasteful number, since it uses less digits than its factorization.

21910153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157766.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 21910153 is about 4680.8282386774. The cubic root of 21910153 is about 279.8219659051.

The spelling of 21910153 in words is "twenty-one million, nine hundred ten thousand, one hundred fifty-three".