20402201401 has 4 divisors (see below), whose sum is σ = 20402540404. Its totient is φ = 20401862400.

The previous prime is 20402201383. The next prime is 20402201453. The reversal of 20402201401 is 10410220402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9900051001 + 10502150400 = 99499^2 + 102480^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402201401 - 2²⁹ = 19865330489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20402205401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52140 + ... + 208621.

It is an arithmetic number, because the mean of its divisors is an integer number (5100635101).

Almost surely, 2^20402201401 is an apocalyptic number.

It is an amenable number.

20402201401 is a deficient number, since it is larger than the sum of its proper divisors (339003).

20402201401 is an equidigital number, since it uses as much as digits as its factorization.

20402201401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339002.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20402201401 its reverse (10410220402), we get a palindrome (30812421803).

The spelling of 20402201401 in words is "twenty billion, four hundred two million, two hundred one thousand, four hundred one".