21264650330 has 32 divisors (see below), whose sum is σ = 47721191040. Its totient is φ = 6627942720.

The previous prime is 21264650279. The next prime is 21264650371. The reversal of 21264650330 is 3305646212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13807445 + ... + 13808984.

It is an arithmetic number, because the mean of its divisors is an integer number (1491287220).

Almost surely, 2^21264650330 is an apocalyptic number.

21264650330 is an abundant number, since it is smaller than the sum of its proper divisors (26456540710).

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

21264650330 is a wasteful number, since it uses less digits than its factorization.

21264650330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27616454.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 21264650330 in words is "twenty-one billion, two hundred sixty-four million, six hundred fifty thousand, three hundred thirty".