20145774234 has 16 divisors (see below), whose sum is σ = 40952066400. Its totient is φ = 6605171760.

The previous prime is 20145774217. The next prime is 20145774263. The reversal of 20145774234 is 43247754102.

It is a junction number, because it is equal to n+sod(n) for n = 20145774192 and 20145774201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27521184 + ... + 27521915.

It is an arithmetic number, because the mean of its divisors is an integer number (2559504150).

Almost surely, 2^20145774234 is an apocalyptic number.

20145774234 is an abundant number, since it is smaller than the sum of its proper divisors (20806292166).

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

20145774234 is a wasteful number, since it uses less digits than its factorization.

20145774234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55043165.

The product of its (nonzero) digits is 188160, while the sum is 39.

The spelling of 20145774234 in words is "twenty billion, one hundred forty-five million, seven hundred seventy-four thousand, two hundred thirty-four".