21202029 has 12 divisors (see below), whose sum is σ = 31277376. Its totient is φ = 13833672.

The previous prime is 21202003. The next prime is 21202033. The reversal of 21202029 is 92020212.

It is not a de Polignac number, because 21202029 - 2⁵ = 21201997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202039) 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 11 ways as a sum of consecutive naturals, for example, 24639 + ... + 25484.

It is an arithmetic number, because the mean of its divisors is an integer number (2606448).

Almost surely, 2^21202029 is an apocalyptic number.

It is an amenable number.

21202029 is a deficient number, since it is larger than the sum of its proper divisors (10075347).

21202029 is a wasteful number, since it uses less digits than its factorization.

21202029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50176 (or 50173 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21202029 is about 4604.5661033370. The cubic root of 21202029 is about 276.7743299630.

The spelling of 21202029 in words is "twenty-one million, two hundred two thousand, twenty-nine".