20125743 has 32 divisors (see below), whose sum is σ = 30730752. Its totient is φ = 11606400.

The previous prime is 20125723. The next prime is 20125747. The reversal of 20125743 is 34752102.

It is a de Polignac number, because none of the positive numbers 2^k-20125743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64558 + ... + 64868.

It is an arithmetic number, because the mean of its divisors is an integer number (960336).

Almost surely, 2^20125743 is an apocalyptic number.

20125743 is a deficient number, since it is larger than the sum of its proper divisors (10605009).

20125743 is a wasteful number, since it uses less digits than its factorization.

20125743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20125743 is about 4486.1724220097. The cubic root of 20125743 is about 272.0094386503.

Adding to 20125743 its reverse (34752102), we get a palindrome (54877845).

The spelling of 20125743 in words is "twenty million, one hundred twenty-five thousand, seven hundred forty-three".