20530412120 has 16 divisors (see below), whose sum is σ = 46193427360. Its totient is φ = 8212164832.

The previous prime is 20530412081. The next prime is 20530412131. The reversal of 20530412120 is 2121403502.

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 = 20530412092 and 20530412101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256630112 + ... + 256630191.

It is an arithmetic number, because the mean of its divisors is an integer number (2887089210).

Almost surely, 2^20530412120 is an apocalyptic number.

20530412120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20530412120 is an abundant number, since it is smaller than the sum of its proper divisors (25663015240).

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

20530412120 is a wasteful number, since it uses less digits than its factorization.

20530412120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513260314 (or 513260310 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20530412120 its reverse (2121403502), we get a palindrome (22651815622).

The spelling of 20530412120 in words is "twenty billion, five hundred thirty million, four hundred twelve thousand, one hundred twenty".