21200320030 has 16 divisors (see below), whose sum is σ = 38786160384. Its totient is φ = 8341109280.

The previous prime is 21200320007. The next prime is 21200320111. The reversal of 21200320030 is 3002300212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17376702 + ... + 17377921.

It is an arithmetic number, because the mean of its divisors is an integer number (2424135024).

Almost surely, 2^21200320030 is an apocalyptic number.

21200320030 is a deficient number, since it is larger than the sum of its proper divisors (17585840354).

21200320030 is a wasteful number, since it uses less digits than its factorization.

21200320030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34754691.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21200320030 its reverse (3002300212), we get a palindrome (24202620242).

The spelling of 21200320030 in words is "twenty-one billion, two hundred million, three hundred twenty thousand, thirty".