20251145345 has 16 divisors (see below), whose sum is σ = 25589571840. Its totient is φ = 15342729984.

The previous prime is 20251145339. The next prime is 20251145357. The reversal of 20251145345 is 54354115202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20251145345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238424 + ... + 312006.

It is an arithmetic number, because the mean of its divisors is an integer number (1599348240).

Almost surely, 2^20251145345 is an apocalyptic number.

It is an amenable number.

20251145345 is a deficient number, since it is larger than the sum of its proper divisors (5338426495).

20251145345 is a wasteful number, since it uses less digits than its factorization.

20251145345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76504.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 20251145345 in words is "twenty billion, two hundred fifty-one million, one hundred forty-five thousand, three hundred forty-five".