21450322150 has 24 divisors (see below), whose sum is σ = 39964935384. Its totient is φ = 8565648000.

The previous prime is 21450322147. The next prime is 21450322171. The reversal of 21450322150 is 5122305412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332076 + ... + 391375.

It is an arithmetic number, because the mean of its divisors is an integer number (1665205641).

Almost surely, 2^21450322150 is an apocalyptic number.

21450322150 is a deficient number, since it is larger than the sum of its proper divisors (18514613234).

21450322150 is a wasteful number, since it uses less digits than its factorization.

21450322150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724056 (or 724051 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21450322150 its reverse (5122305412), we get a palindrome (26572627562).

The spelling of 21450322150 in words is "twenty-one billion, four hundred fifty million, three hundred twenty-two thousand, one hundred fifty".