20123212232 has 8 divisors (see below), whose sum is σ = 37731022950. Its totient is φ = 10061606112.

The previous prime is 20123212183. The next prime is 20123212243. The reversal of 20123212232 is 23221232102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14078771716 + 6044440516 = 118654^2 + 77746^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20123212232² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257700757 + ... + 1257700772.

Almost surely, 2^20123212232 is an apocalyptic number.

It is an amenable number.

20123212232 is a deficient number, since it is larger than the sum of its proper divisors (17607810718).

20123212232 is a wasteful number, since it uses less digits than its factorization.

20123212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515401535 (or 2515401531 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20123212232 its reverse (23221232102), we get a palindrome (43344444334).

The spelling of 20123212232 in words is "twenty billion, one hundred twenty-three million, two hundred twelve thousand, two hundred thirty-two".