2120647420 has 24 divisors (see below), whose sum is σ = 4454249184. Its totient is φ = 848089536.

The previous prime is 2120647381. The next prime is 2120647421. The reversal of 2120647420 is 247460212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120647421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155809 + ... + 168871.

It is an arithmetic number, because the mean of its divisors is an integer number (185593716).

Almost surely, 2^2120647420 is an apocalyptic number.

2120647420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120647420 is an abundant number, since it is smaller than the sum of its proper divisors (2333601764).

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

2120647420 is a wasteful number, since it uses less digits than its factorization.

2120647420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21189 (or 21187 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2120647420 is about 46050.4877281446. The cubic root of 2120647420 is about 1284.7624142501.

The spelling of 2120647420 in words is "two billion, one hundred twenty million, six hundred forty-seven thousand, four hundred twenty".