20120320020 has 48 divisors (see below), whose sum is σ = 56345179968. Its totient is φ = 5364629760.

The previous prime is 20120320013. The next prime is 20120320043. The reversal of 20120320020 is 2002302102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20120319978 and 20120320005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468240 + ... + 509400.

It is an arithmetic number, because the mean of its divisors is an integer number (1173857916).

Almost surely, 2^20120320020 is an apocalyptic number.

20120320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120320020 is an abundant number, since it is smaller than the sum of its proper divisors (36224859948).

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

20120320020 is a wasteful number, since it uses less digits than its factorization.

20120320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49320 (or 49318 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20120320020 its reverse (2002302102), we get a palindrome (22122622122).

The spelling of 20120320020 in words is "twenty billion, one hundred twenty million, three hundred twenty thousand, twenty".