12020857950 has 48 divisors (see below), whose sum is σ = 29824448256. Its totient is φ = 3204194400.

The previous prime is 12020857943. The next prime is 12020857999. The reversal of 12020857950 is 5975802021.

It is a junction number, because it is equal to n+sod(n) for n = 12020857899 and 12020857908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363819 + ... + 395481.

It is an arithmetic number, because the mean of its divisors is an integer number (621342672).

Almost surely, 2^12020857950 is an apocalyptic number.

12020857950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12020857950 is an abundant number, since it is smaller than the sum of its proper divisors (17803590306).

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

12020857950 is a wasteful number, since it uses less digits than its factorization.

12020857950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34209 (or 34204 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 12020857950 in words is "twelve billion, twenty million, eight hundred fifty-seven thousand, nine hundred fifty".