21015150047 has 2 divisors, whose sum is σ = 21015150048. Its totient is φ = 21015150046.

The previous prime is 21015149993. The next prime is 21015150097. The reversal of 21015150047 is 74005151012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21015150047 - 2⁸ = 21015149791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21015149998 and 21015150025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21015150097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507575023 + 10507575024.

It is an arithmetic number, because the mean of its divisors is an integer number (10507575024).

Almost surely, 2^21015150047 is an apocalyptic number.

21015150047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21015150047 is an equidigital number, since it uses as much as digits as its factorization.

21015150047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

The spelling of 21015150047 in words is "twenty-one billion, fifteen million, one hundred fifty thousand, forty-seven".