20702240126 has 16 divisors (see below), whose sum is σ = 31817808288. Its totient is φ = 10096416000.

The previous prime is 20702240089. The next prime is 20702240171. The reversal of 20702240126 is 62104220702.

It is a junction number, because it is equal to n+sod(n) for n = 20702240095 and 20702240104.

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, 380486 + ... + 431478.

It is an arithmetic number, because the mean of its divisors is an integer number (1988613018).

Almost surely, 2^20702240126 is an apocalyptic number.

20702240126 is a deficient number, since it is larger than the sum of its proper divisors (11115568162).

20702240126 is a wasteful number, since it uses less digits than its factorization.

20702240126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55987.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 20702240126 its reverse (62104220702), we get a palindrome (82806460828).

The spelling of 20702240126 in words is "twenty billion, seven hundred two million, two hundred forty thousand, one hundred twenty-six".