21415200047 has 2 divisors, whose sum is σ = 21415200048. Its totient is φ = 21415200046.

The previous prime is 21415200041. The next prime is 21415200061. The reversal of 21415200047 is 74000251412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21415200047 - 2²² = 21411005743 is a prime.

It is a super-2 number, since 2×21415200047² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21415199989 and 21415200025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21415200041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707600023 + 10707600024.

It is an arithmetic number, because the mean of its divisors is an integer number (10707600024).

Almost surely, 2^21415200047 is an apocalyptic number.

21415200047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21415200047 is an equidigital number, since it uses as much as digits as its factorization.

21415200047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

Adding to 21415200047 its reverse (74000251412), we get a palindrome (95415451459).

The spelling of 21415200047 in words is "twenty-one billion, four hundred fifteen million, two hundred thousand, forty-seven".