20120671220 has 48 divisors (see below), whose sum is σ = 45514586880. Its totient is φ = 7427389056.

The previous prime is 20120671211. The next prime is 20120671223. The reversal of 20120671220 is 2217602102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120671223) 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, 1637861 + ... + 1650099.

It is an arithmetic number, because the mean of its divisors is an integer number (948220560).

Almost surely, 2^20120671220 is an apocalyptic number.

20120671220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120671220 is an abundant number, since it is smaller than the sum of its proper divisors (25393915660).

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

20120671220 is a wasteful number, since it uses less digits than its factorization.

20120671220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18584 (or 18582 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The spelling of 20120671220 in words is "twenty billion, one hundred twenty million, six hundred seventy-one thousand, two hundred twenty".