21540200330 has 64 divisors (see below), whose sum is σ = 42680615040. Its totient is φ = 7762003200.

The previous prime is 21540200317. The next prime is 21540200351. The reversal of 21540200330 is 3300204512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11573600 + ... + 11575460.

It is an arithmetic number, because the mean of its divisors is an integer number (666884610).

Almost surely, 2^21540200330 is an apocalyptic number.

21540200330 is a deficient number, since it is larger than the sum of its proper divisors (21140414710).

21540200330 is a wasteful number, since it uses less digits than its factorization.

21540200330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21540200330 its reverse (3300204512), we get a palindrome (24840404842).

The spelling of 21540200330 in words is "twenty-one billion, five hundred forty million, two hundred thousand, three hundred thirty".