111400432020 has 36 divisors (see below), whose sum is σ = 337914644340. Its totient is φ = 29706781824.

The previous prime is 111400431997. The next prime is 111400432037. The reversal of 111400432020 is 20234004111.

It can be written as a sum of positive squares in 2 ways, for example, as 47056021776 + 64344410244 = 216924^2 + 253662^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 111400431984 and 111400432002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309445465 + ... + 309445824.

Almost surely, 2^111400432020 is an apocalyptic number.

111400432020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111400432020 is an abundant number, since it is smaller than the sum of its proper divisors (226514212320).

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

111400432020 is a wasteful number, since it uses less digits than its factorization.

111400432020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618891304 (or 618891299 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 111400432020 its reverse (20234004111), we get a palindrome (131634436131).

The spelling of 111400432020 in words is "one hundred eleven billion, four hundred million, four hundred thirty-two thousand, twenty".