20434511345 has 8 divisors (see below), whose sum is σ = 25587562176. Its totient is φ = 15636843376.

The previous prime is 20434511333. The next prime is 20434511417. The reversal of 20434511345 is 54311543402.

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 20434511345 - 2²² = 20430317041 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, 88845587 + ... + 88845816.

It is an arithmetic number, because the mean of its divisors is an integer number (3198445272).

Almost surely, 2^20434511345 is an apocalyptic number.

It is an amenable number.

20434511345 is a deficient number, since it is larger than the sum of its proper divisors (5153050831).

20434511345 is a wasteful number, since it uses less digits than its factorization.

20434511345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177691431.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20434511345 in words is "twenty billion, four hundred thirty-four million, five hundred eleven thousand, three hundred forty-five".