20025345731 has 8 divisors (see below), whose sum is σ = 20310420480. Its totient is φ = 19741060872.

The previous prime is 20025345707. The next prime is 20025345751. The reversal of 20025345731 is 13754352002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20025345731 is a prime.

It is a super-2 number, since 2×20025345731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20025345751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146315 + ... + 247908.

It is an arithmetic number, because the mean of its divisors is an integer number (2538802560).

Almost surely, 2^20025345731 is an apocalyptic number.

20025345731 is a deficient number, since it is larger than the sum of its proper divisors (285074749).

20025345731 is an equidigital number, since it uses as much as digits as its factorization.

20025345731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394945.

The product of its (nonzero) digits is 25200, while the sum is 32.

Adding to 20025345731 its reverse (13754352002), we get a palindrome (33779697733).

The spelling of 20025345731 in words is "twenty billion, twenty-five million, three hundred forty-five thousand, seven hundred thirty-one".