21415200002 has 12 divisors (see below), whose sum is σ = 37367338950. Its totient is φ = 9177942816.

The previous prime is 21415199987. The next prime is 21415200007. The reversal of 21415200002 is 20000251412.

It can be written as a sum of positive squares in only one way, i.e., 12267999121 + 9147200881 = 110761^2 + 95641^2 .

It is a super-2 number, since 2×21415200002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21415200007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109261127 + ... + 109261322.

Almost surely, 2^21415200002 is an apocalyptic number.

21415200002 is a deficient number, since it is larger than the sum of its proper divisors (15952138948).

21415200002 is a wasteful number, since it uses less digits than its factorization.

21415200002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218522465 (or 218522458 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 21415200002 its reverse (20000251412), we get a palindrome (41415451414).

The spelling of 21415200002 in words is "twenty-one billion, four hundred fifteen million, two hundred thousand, two".