20123422645 has 8 divisors (see below), whose sum is σ = 24239926656. Its totient is φ = 16037525136.

The previous prime is 20123422621. The next prime is 20123422661. The reversal of 20123422645 is 54622432102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123422645 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 7650177 + ... + 7652806.

It is an arithmetic number, because the mean of its divisors is an integer number (3029990832).

Almost surely, 2^20123422645 is an apocalyptic number.

It is an amenable number.

20123422645 is a deficient number, since it is larger than the sum of its proper divisors (4116504011).

20123422645 is a wasteful number, since it uses less digits than its factorization.

20123422645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15303251.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 20123422645 its reverse (54622432102), we get a palindrome (74745854747).

The spelling of 20123422645 in words is "twenty billion, one hundred twenty-three million, four hundred twenty-two thousand, six hundred forty-five".