21204232150 has 24 divisors (see below), whose sum is σ = 39676054320. Its totient is φ = 8430900960.

The previous prime is 21204232099. The next prime is 21204232157. The reversal of 21204232150 is 5123240212.

It is a happy number.

It is a super-2 number, since 2×21204232150² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204232157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261365 + ... + 1278064.

It is an arithmetic number, because the mean of its divisors is an integer number (1653168930).

Almost surely, 2^21204232150 is an apocalyptic number.

21204232150 is a deficient number, since it is larger than the sum of its proper divisors (18471822170).

21204232150 is a wasteful number, since it uses less digits than its factorization.

21204232150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539608 (or 2539603 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21204232150 its reverse (5123240212), we get a palindrome (26327472362).

The spelling of 21204232150 in words is "twenty-one billion, two hundred four million, two hundred thirty-two thousand, one hundred fifty".