20612944777 has 8 divisors (see below), whose sum is σ = 20640614400. Its totient is φ = 20585294400.

The previous prime is 20612944657. The next prime is 20612944799. The reversal of 20612944777 is 77744921602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20612944777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20612944777.

It is not an unprimeable number, because it can be changed into a prime (20612944277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4658188 + ... + 4662610.

It is an arithmetic number, because the mean of its divisors is an integer number (2580076800).

Almost surely, 2^20612944777 is an apocalyptic number.

It is an amenable number.

20612944777 is a deficient number, since it is larger than the sum of its proper divisors (27669623).

20612944777 is a wasteful number, since it uses less digits than its factorization.

20612944777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9623.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 20612944777 in words is "twenty billion, six hundred twelve million, nine hundred forty-four thousand, seven hundred seventy-seven".