21142103402308 has 96 divisors (see below), whose sum is σ = 45219401077760. Its totient is φ = 8447396791680.

The previous prime is 21142103402293. The next prime is 21142103402309. The reversal of 21142103402308 is 80320430124112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21142103402308.

It is not an unprimeable number, because it can be changed into a prime (21142103402309) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 35239603 + ... + 35834533.

Almost surely, 2^{21142103402308} is an apocalyptic number.

21142103402308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21142103402308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22609700538880).

21142103402308 is an abundant number, since it is smaller than the sum of its proper divisors (24077297675452).

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

21142103402308 is a wasteful number, since it uses less digits than its factorization.

21142103402308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596025 (or 596023 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 21142103402308 in words is "twenty-one trillion, one hundred forty-two billion, one hundred three million, four hundred two thousand, three hundred eight".