21014153 has 4 divisors (see below), whose sum is σ = 21091968. Its totient is φ = 20936340.

The previous prime is 21014131. The next prime is 21014167. The reversal of 21014153 is 35141012.

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 a cyclic number.

It is not a de Polignac number, because 21014153 - 2¹⁶ = 20948617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38501 + ... + 39042.

It is an arithmetic number, because the mean of its divisors is an integer number (5272992).

Almost surely, 2^21014153 is an apocalyptic number.

It is an amenable number.

21014153 is a deficient number, since it is larger than the sum of its proper divisors (77815).

21014153 is an equidigital number, since it uses as much as digits as its factorization.

21014153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77814.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21014153 is about 4584.1196537612. The cubic root of 21014153 is about 275.9543831702.

Adding to 21014153 its reverse (35141012), we get a palindrome (56155165).

The spelling of 21014153 in words is "twenty-one million, fourteen thousand, one hundred fifty-three".