21334708051 has 2 divisors, whose sum is σ = 21334708052. Its totient is φ = 21334708050.

The previous prime is 21334708037. The next prime is 21334708091. The reversal of 21334708051 is 15080743312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21334708051 - 2²¹ = 21332610899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21334707998 and 21334708016.

It is not a weakly prime, because it can be changed into another prime (21334708091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667354025 + 10667354026.

It is an arithmetic number, because the mean of its divisors is an integer number (10667354026).

Almost surely, 2^21334708051 is an apocalyptic number.

21334708051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334708051 is an equidigital number, since it uses as much as digits as its factorization.

21334708051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 21334708051 in words is "twenty-one billion, three hundred thirty-four million, seven hundred eight thousand, fifty-one".