20442918345 has 16 divisors (see below), whose sum is σ = 32943986880. Its totient is φ = 10824450624.

The previous prime is 20442918341. The next prime is 20442918383. The reversal of 20442918345 is 54381924402.

It is a happy number.

It is not a de Polignac number, because 20442918345 - 2² = 20442918341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20442918297 and 20442918306.

It is not an unprimeable number, because it can be changed into a prime (20442918341) 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, 4900294 + ... + 4904463.

It is an arithmetic number, because the mean of its divisors is an integer number (2058999180).

Almost surely, 2^20442918345 is an apocalyptic number.

It is an amenable number.

20442918345 is a deficient number, since it is larger than the sum of its proper divisors (12501068535).

20442918345 is a wasteful number, since it uses less digits than its factorization.

20442918345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804904.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 20442918345 in words is "twenty billion, four hundred forty-two million, nine hundred eighteen thousand, three hundred forty-five".