20014002421 has 6 divisors (see below), whose sum is σ = 23281594710. Its totient is φ = 17154859176.

The previous prime is 20014002401. The next prime is 20014002427. The reversal of 20014002421 is 12420041002.

It can be written as a sum of positive squares in only one way, i.e., 17894412900 + 2119589521 = 133770^2 + 46039^2 .

It is not a de Polignac number, because 20014002421 - 2⁵ = 20014002389 is a prime.

It is a super-2 number, since 2×20014002421² (a number of 21 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 = 20014002395 and 20014002404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20014002427) 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 5 ways as a sum of consecutive naturals, for example, 204224466 + ... + 204224563.

It is an arithmetic number, because the mean of its divisors is an integer number (3880265785).

Almost surely, 2^20014002421 is an apocalyptic number.

It is an amenable number.

20014002421 is a deficient number, since it is larger than the sum of its proper divisors (3267592289).

20014002421 is an equidigital number, since it uses as much as digits as its factorization.

20014002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408449043 (or 408449036 counting only the distinct ones).

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

Adding to 20014002421 its reverse (12420041002), we get a palindrome (32434043423).

The spelling of 20014002421 in words is "twenty billion, fourteen million, two thousand, four hundred twenty-one".