21346021050 has 48 divisors (see below), whose sum is σ = 52947548640. Its totient is φ = 5691259840.

The previous prime is 21346021027. The next prime is 21346021087. The reversal of 21346021050 is 5012064312.

It is a super-2 number, since 2×21346021050² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21346021050.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1255909 + ... + 1272791.

It is an arithmetic number, because the mean of its divisors is an integer number (1103073930).

Almost surely, 2^21346021050 is an apocalyptic number.

21346021050 is an abundant number, since it is smaller than the sum of its proper divisors (31601527590).

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

21346021050 is a wasteful number, since it uses less digits than its factorization.

21346021050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25327 (or 25322 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21346021050 its reverse (5012064312), we get a palindrome (26358085362).

The spelling of 21346021050 in words is "twenty-one billion, three hundred forty-six million, twenty-one thousand, fifty".