21524099983 has 2 divisors, whose sum is σ = 21524099984. Its totient is φ = 21524099982.

The previous prime is 21524099969. The next prime is 21524100019. The reversal of 21524099983 is 38999042512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21524099983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21524099983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21524099903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10762049991 + 10762049992.

It is an arithmetic number, because the mean of its divisors is an integer number (10762049992).

Almost surely, 2^21524099983 is an apocalyptic number.

21524099983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21524099983 is an equidigital number, since it uses as much as digits as its factorization.

21524099983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 21524099983 in words is "twenty-one billion, five hundred twenty-four million, ninety-nine thousand, nine hundred eighty-three".