21054430037 has 2 divisors, whose sum is σ = 21054430038. Its totient is φ = 21054430036.

The previous prime is 21054430009. The next prime is 21054430049. The reversal of 21054430037 is 73003445012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13576677361 + 7477752676 = 116519^2 + 86474^2 .

It is a cyclic number.

It is not a de Polignac number, because 21054430037 - 2¹² = 21054425941 is a prime.

It is a super-3 number, since 3×21054430037³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21054429991 and 21054430009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21054430097) 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 as a sum of consecutive naturals, namely, 10527215018 + 10527215019.

It is an arithmetic number, because the mean of its divisors is an integer number (10527215019).

Almost surely, 2^21054430037 is an apocalyptic number.

It is an amenable number.

21054430037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21054430037 is an equidigital number, since it uses as much as digits as its factorization.

21054430037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 29.

Adding to 21054430037 its reverse (73003445012), we get a palindrome (94057875049).

The spelling of 21054430037 in words is "twenty-one billion, fifty-four million, four hundred thirty thousand, thirty-seven".