20112420401 has 16 divisors (see below), whose sum is σ = 21847947264. Its totient is φ = 18440588544.

The previous prime is 20112420347. The next prime is 20112420413. The reversal of 20112420401 is 10402421102.

It is a cyclic number.

It is not a de Polignac number, because 20112420401 - 2¹⁸ = 20112158257 is a prime.

It is a super-2 number, since 2×20112420401² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 20112420401.

It is not an unprimeable number, because it can be changed into a prime (20112420421) 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, 244055 + ... + 315891.

It is an arithmetic number, because the mean of its divisors is an integer number (1365496704).

Almost surely, 2^20112420401 is an apocalyptic number.

It is an amenable number.

20112420401 is a deficient number, since it is larger than the sum of its proper divisors (1735526863).

20112420401 is a wasteful number, since it uses less digits than its factorization.

20112420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72280.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20112420401 its reverse (10402421102), we get a palindrome (30514841503).

The spelling of 20112420401 in words is "twenty billion, one hundred twelve million, four hundred twenty thousand, four hundred one".