20128232274 has 32 divisors (see below), whose sum is σ = 42427800000. Its totient is φ = 6348397824.

The previous prime is 20128232273. The next prime is 20128232291. The reversal of 20128232274 is 47223282102.

It is a super-2 number, since 2×20128232274² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20128232273) 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, 16899 + ... + 201350.

It is an arithmetic number, because the mean of its divisors is an integer number (1325868750).

Almost surely, 2^20128232274 is an apocalyptic number.

20128232274 is an abundant number, since it is smaller than the sum of its proper divisors (22299567726).

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

20128232274 is a wasteful number, since it uses less digits than its factorization.

20128232274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219082.

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 20128232274 in words is "twenty billion, one hundred twenty-eight million, two hundred thirty-two thousand, two hundred seventy-four".