21029163 has 8 divisors (see below), whose sum is σ = 28635648. Its totient is φ = 13721064.

The previous prime is 21029149. The next prime is 21029167. The reversal of 21029163 is 36192012.

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

It is not a de Polignac number, because 21029163 - 2⁵ = 21029131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21029167) 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, 74431 + ... + 74712.

It is an arithmetic number, because the mean of its divisors is an integer number (3579456).

Almost surely, 2^21029163 is an apocalyptic number.

21029163 is a deficient number, since it is larger than the sum of its proper divisors (7606485).

21029163 is a wasteful number, since it uses less digits than its factorization.

21029163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149193.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 21029163 is about 4585.7565351859. The cubic root of 21029163 is about 276.0200704791.

The spelling of 21029163 in words is "twenty-one million, twenty-nine thousand, one hundred sixty-three".