21353002 has 16 divisors (see below), whose sum is σ = 35030592. Its totient is φ = 9681120.

The previous prime is 21352999. The next prime is 21353009. The reversal of 21353002 is 20035312.

It is not an unprimeable number, because it can be changed into a prime (21353009) 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 7 ways as a sum of consecutive naturals, for example, 9718 + ... + 11710.

It is an arithmetic number, because the mean of its divisors is an integer number (2189412).

Almost surely, 2^21353002 is an apocalyptic number.

21353002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21353002 is a deficient number, since it is larger than the sum of its proper divisors (13677590).

21353002 is a wasteful number, since it uses less digits than its factorization.

21353002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 21353002 is about 4620.9308586041. The cubic root of 21353002 is about 277.4297178829.

Adding to 21353002 its reverse (20035312), we get a palindrome (41388314).

The spelling of 21353002 in words is "twenty-one million, three hundred fifty-three thousand, two".