20434507375 has 8 divisors (see below), whose sum is σ = 25502265360. Its totient is φ = 16347605800.

The previous prime is 20434507351. The next prime is 20434507403. The reversal of 20434507375 is 57370543402.

It is not a de Polignac number, because 20434507375 - 2⁹ = 20434506863 is a prime.

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, 81737905 + ... + 81738154.

It is an arithmetic number, because the mean of its divisors is an integer number (3187783170).

Almost surely, 2^20434507375 is an apocalyptic number.

20434507375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20434507375 is a deficient number, since it is larger than the sum of its proper divisors (5067757985).

20434507375 is an equidigital number, since it uses as much as digits as its factorization.

20434507375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163476074 (or 163476064 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 40.

The spelling of 20434507375 in words is "twenty billion, four hundred thirty-four million, five hundred seven thousand, three hundred seventy-five".