22515020002 has 4 divisors (see below), whose sum is σ = 33772530006. Its totient is φ = 11257510000.

The previous prime is 22515019957. The next prime is 22515020041. The reversal of 22515020002 is 20002051522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16227957321 + 6287062681 = 127389^2 + 79291^2 .

It is a super-2 number, since 2×22515020002² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5628754999 + ... + 5628755002.

Almost surely, 2^22515020002 is an apocalyptic number.

22515020002 is a deficient number, since it is larger than the sum of its proper divisors (11257510004).

22515020002 is a wasteful number, since it uses less digits than its factorization.

22515020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11257510003.

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 22515020002 its reverse (20002051522), we get a palindrome (42517071524).

The spelling of 22515020002 in words is "twenty-two billion, five hundred fifteen million, twenty thousand, two".