21303157827 has 48 divisors (see below), whose sum is σ = 36826669440. Its totient is φ = 10854127872.

The previous prime is 21303157783. The next prime is 21303157859. The reversal of 21303157827 is 72875130312.

It is not a de Polignac number, because 21303157827 - 2³² = 17008190531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21303157877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176853 + ... + 271814.

It is an arithmetic number, because the mean of its divisors is an integer number (767222280).

Almost surely, 2^21303157827 is an apocalyptic number.

21303157827 is a deficient number, since it is larger than the sum of its proper divisors (15523511613).

21303157827 is a wasteful number, since it uses less digits than its factorization.

21303157827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448720 (or 448713 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 21303157827 in words is "twenty-one billion, three hundred three million, one hundred fifty-seven thousand, eight hundred twenty-seven".