21534002059 has 2 divisors, whose sum is σ = 21534002060. Its totient is φ = 21534002058.

The previous prime is 21534001991. The next prime is 21534002071. The reversal of 21534002059 is 95020043512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21534002059 - 2¹⁵ = 21533969291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21534002059.

It is not a weakly prime, because it can be changed into another prime (21532002059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10767001029 + 10767001030.

It is an arithmetic number, because the mean of its divisors is an integer number (10767001030).

Almost surely, 2^21534002059 is an apocalyptic number.

21534002059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21534002059 is an equidigital number, since it uses as much as digits as its factorization.

21534002059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 21534002059 in words is "twenty-one billion, five hundred thirty-four million, two thousand, fifty-nine".