20111031432 has 32 divisors (see below), whose sum is σ = 55863976800. Its totient is φ = 6703677072.

The previous prime is 20111031431. The next prime is 20111031463. The reversal of 20111031432 is 23413011102.

20111031432 is a `hidden beast` number, since 201 + 1 + 1 + 0 + 31 + 432 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20111031431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46553098 + ... + 46553529.

It is an arithmetic number, because the mean of its divisors is an integer number (1745749275).

Almost surely, 2^20111031432 is an apocalyptic number.

It is an amenable number.

20111031432 is an abundant number, since it is smaller than the sum of its proper divisors (35752945368).

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

20111031432 is a wasteful number, since it uses less digits than its factorization.

20111031432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93106642 (or 93106632 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20111031432 its reverse (23413011102), we get a palindrome (43524042534).

The spelling of 20111031432 in words is "twenty billion, one hundred eleven million, thirty-one thousand, four hundred thirty-two".