20404200402031 has 8 divisors (see below), whose sum is σ = 20411755822080. Its totient is φ = 20396646340248.

The previous prime is 20404200402029. The next prime is 20404200402083. The reversal of 20404200402031 is 13020400240402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20404200402031 - 2¹ = 20404200402029 is a prime.

It is a super-2 number, since 2×20404200402031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20404200401993 and 20404200402011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404200402331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30217360 + ... + 30885226.

It is an arithmetic number, because the mean of its divisors is an integer number (2551469477760).

Almost surely, 2^{20404200402031} is an apocalyptic number.

20404200402031 is a deficient number, since it is larger than the sum of its proper divisors (7555420049).

20404200402031 is an equidigital number, since it uses as much as digits as its factorization.

20404200402031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679133.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20404200402031 its reverse (13020400240402), we get a palindrome (33424600642433).

The spelling of 20404200402031 in words is "twenty trillion, four hundred four billion, two hundred million, four hundred two thousand, thirty-one".