20111430401 has 16 divisors (see below), whose sum is σ = 21045501696. Its totient is φ = 19200208896.

The previous prime is 20111430397. The next prime is 20111430461. The reversal of 20111430401 is 10403411102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20111430401 - 2² = 20111430397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20111430401.

It is not an unprimeable number, because it can be changed into a prime (20111430461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621320 + ... + 652886.

It is an arithmetic number, because the mean of its divisors is an integer number (1315343856).

Almost surely, 2^20111430401 is an apocalyptic number.

It is an amenable number.

20111430401 is a deficient number, since it is larger than the sum of its proper divisors (934071295).

20111430401 is a wasteful number, since it uses less digits than its factorization.

20111430401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31928.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20111430401 its reverse (10403411102), we get a palindrome (30514841503).

The spelling of 20111430401 in words is "twenty billion, one hundred eleven million, four hundred thirty thousand, four hundred one".