21202254150 has 192 divisors, whose sum is σ = 67156701696. Its totient is φ = 4298112000.

The previous prime is 21202254149. The next prime is 21202254193. The reversal of 21202254150 is 5145220212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21202254150.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 451164 + ... + 495936.

It is an arithmetic number, because the mean of its divisors is an integer number (349774488).

Almost surely, 2^21202254150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202254150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33578350848).

21202254150 is an abundant number, since it is smaller than the sum of its proper divisors (45954447546).

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

21202254150 is a wasteful number, since it uses less digits than its factorization.

21202254150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44847 (or 44842 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 21202254150 its reverse (5145220212), we get a palindrome (26347474362).

The spelling of 21202254150 in words is "twenty-one billion, two hundred two million, two hundred fifty-four thousand, one hundred fifty".