21850205340174 has 16 divisors (see below), whose sum is σ = 45110101347840. Its totient is φ = 7048453335480.

The previous prime is 21850205340133. The next prime is 21850205340181. The reversal of 21850205340174 is 47104350205812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58737110944 + ... + 58737111315.

It is an arithmetic number, because the mean of its divisors is an integer number (2819381334240).

Almost surely, 2^{21850205340174} is an apocalyptic number.

21850205340174 is an abundant number, since it is smaller than the sum of its proper divisors (23259896007666).

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

21850205340174 is a wasteful number, since it uses less digits than its factorization.

21850205340174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117474222295.

The product of its (nonzero) digits is 268800, while the sum is 42.

Adding to 21850205340174 its reverse (47104350205812), we get a palindrome (68954555545986).

The spelling of 21850205340174 in words is "twenty-one trillion, eight hundred fifty billion, two hundred five million, three hundred forty thousand, one hundred seventy-four".