20401123332 has 24 divisors (see below), whose sum is σ = 47693654176. Its totient is φ = 6787369728.

The previous prime is 20401123331. The next prime is 20401123373. The reversal of 20401123332 is 23332110402.

It is a junction number, because it is equal to n+sod(n) for n = 20401123299 and 20401123308.

It is not an unprimeable number, because it can be changed into a prime (20401123331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619053 + ... + 1631604.

Almost surely, 2^20401123332 is an apocalyptic number.

It is an amenable number.

20401123332 is an abundant number, since it is smaller than the sum of its proper divisors (27292530844).

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

20401123332 is a wasteful number, since it uses less digits than its factorization.

20401123332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251187 (or 3251185 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20401123332 its reverse (23332110402), we get a palindrome (43733233734).

The spelling of 20401123332 in words is "twenty billion, four hundred one million, one hundred twenty-three thousand, three hundred thirty-two".