20262161111 has 8 divisors (see below), whose sum is σ = 20352103200. Its totient is φ = 20172327840.

The previous prime is 20262161099. The next prime is 20262161141. The reversal of 20262161111 is 11116126202.

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-20262161111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20262161141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358046 + ... + 410756.

It is an arithmetic number, because the mean of its divisors is an integer number (2544012900).

Almost surely, 2^20262161111 is an apocalyptic number.

20262161111 is a deficient number, since it is larger than the sum of its proper divisors (89942089).

20262161111 is a wasteful number, since it uses less digits than its factorization.

20262161111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54409.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 20262161111 its reverse (11116126202), we get a palindrome (31378287313).

The spelling of 20262161111 in words is "twenty billion, two hundred sixty-two million, one hundred sixty-one thousand, one hundred eleven".