21012302232 has 32 divisors (see below), whose sum is σ = 58367506800. Its totient is φ = 7004100672.

The previous prime is 21012302221. The next prime is 21012302239. The reversal of 21012302232 is 23220321012.

21012302232 is a `hidden beast` number, since 210 + 1 + 230 + 223 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012302239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48639373 + ... + 48639804.

Almost surely, 2^21012302232 is an apocalyptic number.

It is an amenable number.

21012302232 is an abundant number, since it is smaller than the sum of its proper divisors (37355204568).

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

21012302232 is a wasteful number, since it uses less digits than its factorization.

21012302232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97279192 (or 97279182 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21012302232 its reverse (23220321012), we get a palindrome (44232623244).

The spelling of 21012302232 in words is "twenty-one billion, twelve million, three hundred two thousand, two hundred thirty-two".