21352305507 has 96 divisors (see below), whose sum is σ = 35859801600. Its totient is φ = 11204683776.

The previous prime is 21352305503. The next prime is 21352305587. The reversal of 21352305507 is 70550325312.

It is not a de Polignac number, because 21352305507 - 2² = 21352305503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21352305503) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3763669 + ... + 3769337.

It is an arithmetic number, because the mean of its divisors is an integer number (373539600).

Almost surely, 2^21352305507 is an apocalyptic number.

21352305507 is a deficient number, since it is larger than the sum of its proper divisors (14507496093).

21352305507 is a wasteful number, since it uses less digits than its factorization.

21352305507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5757 (or 5744 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 33.

The spelling of 21352305507 in words is "twenty-one billion, three hundred fifty-two million, three hundred five thousand, five hundred seven".