20401414021 has 2 divisors, whose sum is σ = 20401414022. Its totient is φ = 20401414020.

The previous prime is 20401413971. The next prime is 20401414081. The reversal of 20401414021 is 12041410402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15467896900 + 4933517121 = 124370^2 + 70239^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401414021 - 2²⁹ = 19864543109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20401414021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401414081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200707010 + 10200707011.

It is an arithmetic number, because the mean of its divisors is an integer number (10200707011).

Almost surely, 2^20401414021 is an apocalyptic number.

It is an amenable number.

20401414021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401414021 is an equidigital number, since it uses as much as digits as its factorization.

20401414021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20401414021 its reverse (12041410402), we get a palindrome (32442824423).

The spelling of 20401414021 in words is "twenty billion, four hundred one million, four hundred fourteen thousand, twenty-one".