20968603997 has 8 divisors (see below), whose sum is σ = 22994606592. Its totient is φ = 18962562400.

The previous prime is 20968603987. The next prime is 20968604039. The reversal of 20968603997 is 79930686902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20968603997 - 2²² = 20964409693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20968603907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4988048 + ... + 4992249.

It is an arithmetic number, because the mean of its divisors is an integer number (2874325824).

Almost surely, 2^20968603997 is an apocalyptic number.

It is an amenable number.

20968603997 is a deficient number, since it is larger than the sum of its proper divisors (2026002595).

20968603997 is a wasteful number, since it uses less digits than its factorization.

20968603997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980499.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 20968603997 in words is "twenty billion, nine hundred sixty-eight million, six hundred three thousand, nine hundred ninety-seven".