71112020 has 48 divisors (see below), whose sum is σ = 180714240. Its totient is φ = 22946304.

The previous prime is 71112017. The next prime is 71112029. The reversal of 71112020 is 2021117.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 71111986 and 71112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71112029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12560 + ... + 17319.

It is an arithmetic number, because the mean of its divisors is an integer number (3764880).

Almost surely, 2^71112020 is an apocalyptic number.

71112020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71112020 is an abundant number, since it is smaller than the sum of its proper divisors (109602220).

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

71112020 is a wasteful number, since it uses less digits than its factorization.

71112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29912 (or 29910 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 71112020 is about 8432.7943174253. The cubic root of 71112020 is about 414.2994325337.

Adding to 71112020 its reverse (2021117), we get a palindrome (73133137).

The spelling of 71112020 in words is "seventy-one million, one hundred twelve thousand, twenty".