20212154120 has 32 divisors (see below), whose sum is σ = 45540662400. Its totient is φ = 8073605568.

The previous prime is 20212154089. The next prime is 20212154141. The reversal of 20212154120 is 2145121202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20212154092 and 20212154101.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 322634 + ... + 380153.

It is an arithmetic number, because the mean of its divisors is an integer number (1423145700).

Almost surely, 2^20212154120 is an apocalyptic number.

20212154120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212154120 is an abundant number, since it is smaller than the sum of its proper divisors (25328508280).

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

20212154120 is a wasteful number, since it uses less digits than its factorization.

20212154120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703517 (or 703513 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20212154120 its reverse (2145121202), we get a palindrome (22357275322).

The spelling of 20212154120 in words is "twenty billion, two hundred twelve million, one hundred fifty-four thousand, one hundred twenty".