7971235020 has 72 divisors (see below), whose sum is σ = 27633619104. Its totient is φ = 1821996288.

The previous prime is 7971235007. The next prime is 7971235021. The reversal of 7971235020 is 205321797.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (7971235021) 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 23 ways as a sum of consecutive naturals, for example, 3161929 + ... + 3164448.

Almost surely, 2^7971235020 is an apocalyptic number.

7971235020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7971235020 is an abundant number, since it is smaller than the sum of its proper divisors (19662384084).

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

7971235020 is a wasteful number, since it uses less digits than its factorization.

7971235020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6326399 (or 6326394 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 7971235020 is about 89281.7731678756. The cubic root of 7971235020 is about 1997.6000395803.

The spelling of 7971235020 in words is "seven billion, nine hundred seventy-one million, two hundred thirty-five thousand, twenty".