21327305510 has 32 divisors (see below), whose sum is σ = 44474329152. Its totient is φ = 7212049920.

The previous prime is 21327305509. The next prime is 21327305539. The reversal of 21327305510 is 1550372312.

It is a congruent number.

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, 2081711 + ... + 2091930.

It is an arithmetic number, because the mean of its divisors is an integer number (1389822786).

Almost surely, 2^21327305510 is an apocalyptic number.

21327305510 is an abundant number, since it is smaller than the sum of its proper divisors (23147023642).

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

21327305510 is a wasteful number, since it uses less digits than its factorization.

21327305510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173728.

The product of its (nonzero) digits is 6300, while the sum is 29.

Adding to 21327305510 its reverse (1550372312), we get a palindrome (22877677822).

The spelling of 21327305510 in words is "twenty-one billion, three hundred twenty-seven million, three hundred five thousand, five hundred ten".