21346421060 has 12 divisors (see below), whose sum is σ = 44827484268. Its totient is φ = 8538568416.

The previous prime is 21346421051. The next prime is 21346421111. The reversal of 21346421060 is 6012464312.

It can be written as a sum of positive squares in 2 ways, for example, as 6805920004 + 14540501056 = 82498^2 + 120584^2 .

It is a super-3 number, since 3×21346421060³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533660507 + ... + 533660546.

It is an arithmetic number, because the mean of its divisors is an integer number (3735623689).

Almost surely, 2^21346421060 is an apocalyptic number.

21346421060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21346421060 is an abundant number, since it is smaller than the sum of its proper divisors (23481063208).

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

21346421060 is a wasteful number, since it uses less digits than its factorization.

21346421060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067321062 (or 1067321060 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21346421060 its reverse (6012464312), we get a palindrome (27358885372).

The spelling of 21346421060 in words is "twenty-one billion, three hundred forty-six million, four hundred twenty-one thousand, sixty".