21250416505146 has 8 divisors (see below), whose sum is σ = 42500833010304. Its totient is φ = 7083472168380.

The previous prime is 21250416505141. The next prime is 21250416505169. The reversal of 21250416505146 is 64150561405212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21250416505146 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21250416505098 and 21250416505107.

It is not an unprimeable number, because it can be changed into a prime (21250416505141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770868042090 + ... + 1770868042101.

It is an arithmetic number, because the mean of its divisors is an integer number (5312604126288).

Almost surely, 2^{21250416505146} is an apocalyptic number.

21250416505146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21250416505146 is a wasteful number, since it uses less digits than its factorization.

21250416505146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541736084196.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 21250416505146 in words is "twenty-one trillion, two hundred fifty billion, four hundred sixteen million, five hundred five thousand, one hundred forty-six".