20212044345 has 32 divisors (see below), whose sum is σ = 38046205440. Its totient is φ = 10145652480.

The previous prime is 20212044343. The next prime is 20212044367. The reversal of 20212044345 is 54344021202.

20212044345 is a `hidden beast` number, since 2 + 0 + 21 + 204 + 434 + 5 = 666.

It is not a de Polignac number, because 20212044345 - 2¹ = 20212044343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20212044341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4401201 + ... + 4405790.

It is an arithmetic number, because the mean of its divisors is an integer number (1188943920).

Almost surely, 2^20212044345 is an apocalyptic number.

It is an amenable number.

20212044345 is a deficient number, since it is larger than the sum of its proper divisors (17834161095).

20212044345 is a wasteful number, since it uses less digits than its factorization.

20212044345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8807022 (or 8807016 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20212044345 its reverse (54344021202), we get a palindrome (74556065547).

The spelling of 20212044345 in words is "twenty billion, two hundred twelve million, forty-four thousand, three hundred forty-five".