20742734325 has 24 divisors (see below), whose sum is σ = 34856869216. Its totient is φ = 10881432000.

The previous prime is 20742734293. The next prime is 20742734377. The reversal of 20742734325 is 52343724702.

It is not a de Polignac number, because 20742734325 - 2⁵ = 20742734293 is a prime.

It is a super-2 number, since 2×20742734325² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2262391 + ... + 2271540.

Almost surely, 2^20742734325 is an apocalyptic number.

20742734325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20742734325 is a deficient number, since it is larger than the sum of its proper divisors (14114134891).

20742734325 is a wasteful number, since it uses less digits than its factorization.

20742734325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534005 (or 4534000 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 39.

The spelling of 20742734325 in words is "twenty billion, seven hundred forty-two million, seven hundred thirty-four thousand, three hundred twenty-five".