20145256345 has 8 divisors (see below), whose sum is σ = 24182827776. Its totient is φ = 16110524976.

The previous prime is 20145256321. The next prime is 20145256361. The reversal of 20145256345 is 54365254102.

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

It is a cyclic number.

It is not a de Polignac number, because 20145256345 - 2¹³ = 20145248153 is a prime.

It is a Duffinian 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, 694377 + ... + 722806.

It is an arithmetic number, because the mean of its divisors is an integer number (3022853472).

Almost surely, 2^20145256345 is an apocalyptic number.

It is an amenable number.

20145256345 is a deficient number, since it is larger than the sum of its proper divisors (4037571431).

20145256345 is a wasteful number, since it uses less digits than its factorization.

20145256345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420031.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 20145256345 in words is "twenty billion, one hundred forty-five million, two hundred fifty-six thousand, three hundred forty-five".