20150221002 has 32 divisors (see below), whose sum is σ = 40562121600. Its totient is φ = 6673168128.

The previous prime is 20150220991. The next prime is 20150221019. The reversal of 20150221002 is 20012205102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2730774 + ... + 2738142.

It is an arithmetic number, because the mean of its divisors is an integer number (1267566300).

Almost surely, 2^20150221002 is an apocalyptic number.

20150221002 is an abundant number, since it is smaller than the sum of its proper divisors (20411900598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20150221002 is a wasteful number, since it uses less digits than its factorization.

20150221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10270.

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 20150221002 its reverse (20012205102), we get a palindrome (40162426104).

The spelling of 20150221002 in words is "twenty billion, one hundred fifty million, two hundred twenty-one thousand, two".