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21032002 = 230493449
BaseRepresentation
bin101000000111…
…0110001000010
31110120112111001
41100032301002
520341011002
62030442214
7343524535
oct120166102
943515431
1021032002
1110965722
12706336a
134485094
142b16a1c
151ca6a87
hex140ec42

21032002 has 8 divisors (see below), whose sum is σ = 31567500. Its totient is φ = 10509504.

The previous prime is 21031979. The next prime is 21032003. The reversal of 21032002 is 20023012.

It can be written as a sum of positive squares in 2 ways, for example, as 14676561 + 6355441 = 3831^2 + 2521^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21032002.

It is not an unprimeable number, because it can be changed into a prime (21032003) 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, 4374 + ... + 7822.

Almost surely, 221032002 is an apocalyptic number.

21032002 is a deficient number, since it is larger than the sum of its proper divisors (10535498).

21032002 is a wasteful number, since it uses less digits than its factorization.

21032002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 21032002 is about 4586.0660701739. The cubic root of 21032002 is about 276.0324910990.

Adding to 21032002 its reverse (20023012), we get a palindrome (41055014).

The spelling of 21032002 in words is "twenty-one million, thirty-two thousand, two".

Divisors: 1 2 3049 3449 6098 6898 10516001 21032002