20963577813 has 8 divisors (see below), whose sum is σ = 27952928448. Its totient is φ = 13974972864.

The previous prime is 20963577757. The next prime is 20963577883. The reversal of 20963577813 is 31877536902.

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

It is not a de Polignac number, because 20963577813 - 2¹² = 20963573717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963577883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117145 + ... + 235902.

It is an arithmetic number, because the mean of its divisors is an integer number (3494116056).

Almost surely, 2^20963577813 is an apocalyptic number.

It is an amenable number.

20963577813 is a deficient number, since it is larger than the sum of its proper divisors (6989350635).

20963577813 is a wasteful number, since it uses less digits than its factorization.

20963577813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372843.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 20963577813 in words is "twenty billion, nine hundred sixty-three million, five hundred seventy-seven thousand, eight hundred thirteen".