20531002 has 8 divisors (see below), whose sum is σ = 32608116. Its totient is φ = 9661632.

The previous prime is 20530987. The next prime is 20531023. The reversal of 20531002 is 20013502.

It can be written as a sum of positive squares in 2 ways, for example, as 19704721 + 826281 = 4439^2 + 909^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301893 + ... + 301960.

Almost surely, 2^20531002 is an apocalyptic number.

20531002 is a deficient number, since it is larger than the sum of its proper divisors (12077114).

20531002 is a wasteful number, since it uses less digits than its factorization.

20531002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603872.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20531002 is about 4531.1148738473. The cubic root of 20531002 is about 273.8230782846.

Adding to 20531002 its reverse (20013502), we get a palindrome (40544504).

The spelling of 20531002 in words is "twenty million, five hundred thirty-one thousand, two".