21235690307 has 16 divisors (see below), whose sum is σ = 23671116000. Its totient is φ = 18915585024.

The previous prime is 21235690303. The next prime is 21235690337. The reversal of 21235690307 is 70309653212.

It is a cyclic number.

It is not a de Polignac number, because 21235690307 - 2² = 21235690303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21235690303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697244 + ... + 727062.

It is an arithmetic number, because the mean of its divisors is an integer number (1479444750).

Almost surely, 2^21235690307 is an apocalyptic number.

21235690307 is a deficient number, since it is larger than the sum of its proper divisors (2435425693).

21235690307 is a wasteful number, since it uses less digits than its factorization.

21235690307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31750.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 21235690307 in words is "twenty-one billion, two hundred thirty-five million, six hundred ninety thousand, three hundred seven".