20127740 has 24 divisors (see below), whose sum is σ = 43727040. Its totient is φ = 7773248.

The previous prime is 20127739. The next prime is 20127781. The reversal of 20127740 is 4772102.

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, 16772 + ... + 17931.

It is an arithmetic number, because the mean of its divisors is an integer number (1821960).

Almost surely, 2^20127740 is an apocalyptic number.

20127740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20127740 is an abundant number, since it is smaller than the sum of its proper divisors (23599300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20127740 is a wasteful number, since it uses less digits than its factorization.

20127740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34741 (or 34739 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20127740 is about 4486.3949892982. The cubic root of 20127740 is about 272.0184351692.

Adding to 20127740 its reverse (4772102), we get a palindrome (24899842).

The spelling of 20127740 in words is "twenty million, one hundred twenty-seven thousand, seven hundred forty".