21415200007 has 2 divisors, whose sum is σ = 21415200008. Its totient is φ = 21415200006.

The previous prime is 21415199987. The next prime is 21415200013. The reversal of 21415200007 is 70000251412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21415200007 - 2²³ = 21406811399 is a prime.

It is a super-2 number, since 2×21415200007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21415200047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707600003 + 10707600004.

It is an arithmetic number, because the mean of its divisors is an integer number (10707600004).

Almost surely, 2^21415200007 is an apocalyptic number.

21415200007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21415200007 is an equidigital number, since it uses as much as digits as its factorization.

21415200007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

Adding to 21415200007 its reverse (70000251412), we get a palindrome (91415451419).

The spelling of 21415200007 in words is "twenty-one billion, four hundred fifteen million, two hundred thousand, seven".