78022120020 has 48 divisors (see below), whose sum is σ = 235266702720. Its totient is φ = 19205444736.

The previous prime is 78022120003. The next prime is 78022120021. The reversal of 78022120020 is 2002122087.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78022120021) 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, 50013400 + ... + 50014959.

It is an arithmetic number, because the mean of its divisors is an integer number (4901389640).

Almost surely, 2^78022120020 is an apocalyptic number.

It is an amenable number.

78022120020 is an abundant number, since it is smaller than the sum of its proper divisors (157244582700).

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

78022120020 is a wasteful number, since it uses less digits than its factorization.

78022120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100028384 (or 100028382 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The spelling of 78022120020 in words is "seventy-eight billion, twenty-two million, one hundred twenty thousand, twenty".