21488850707 has 2 divisors, whose sum is σ = 21488850708. Its totient is φ = 21488850706.

The previous prime is 21488850673. The next prime is 21488850727. The reversal of 21488850707 is 70705888412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21488850707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21488850727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10744425353 + 10744425354.

It is an arithmetic number, because the mean of its divisors is an integer number (10744425354).

Almost surely, 2^21488850707 is an apocalyptic number.

21488850707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21488850707 is an equidigital number, since it uses as much as digits as its factorization.

21488850707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1003520, while the sum is 50.

The spelling of 21488850707 in words is "twenty-one billion, four hundred eighty-eight million, eight hundred fifty thousand, seven hundred seven".